The projected Democratic control of Congress after the 2026 midterms will soon be tested not by rhetoric about foreign policy, but by concrete votes: on aid to Ukraine, on the President’s tariff authority, and on funding for the war involving Iran. Those three areas — Ukraine, tariffs and Iran — are where the new balance of power in Washington is most likely to produce visible confrontations, negotiations and compromises. This article examines the policy levers Congress actually holds in each area, and how a Democratic House and Senate, if confirmed through certification, would change the White House’s room to manoeuvre abroad. It is distinct from reporting on how foreign governments reacted to the result; it focuses on the legislative tools and votes that lie ahead.
The starting point is the projected shape of Congress. Democrats flipped six Republican Senate seats — in North Carolina, South Carolina, Texas, Ohio, Kansas and Iowa — and reporting put Democrats at 51 Senate seats. Democrats had entered the election needing a net gain of four seats. In the House, CNN and Decision Desk HQ projected a Democratic majority, CBS projected Democrats at at least 208 seats against at least 160 for Republicans, with 218 needed for a majority, and the Associated Press had not yet formally called House control in early November 4 reporting. CNN sources said Democrats were on course for at least 230 House seats, possibly approaching 240. Those projections, if confirmed, give Democrats control of both chambers, but not a veto-proof majority, and not control of the White House. That combination defines the policy fights ahead: Congress can pass bills, hold hearings and control spending, but the President can veto legislation and retains broad executive authority over diplomacy and military operations.
Ukraine aid is likely to be one of the first foreign policy tests. Aid to Ukraine has historically involved a mix of military assistance, economic support and humanitarian funding, usually packaged in supplemental appropriations bills that must pass both chambers and be signed by the President. A Democratic Congress is expected to be more supportive of such packages than the previous Republican-controlled Congress, which contained stronger scepticism about the scale and duration of aid. That does not mean aid will pass easily. Democrats will still need to agree on the amount, on conditions and oversight, on how aid is linked to other spending priorities, and on whether aid is passed as a standalone bill or as part of a larger package. Republicans who support Ukraine aid may join Democrats, while Republicans who oppose it may argue that American resources should be focused at home, particularly given cost-of-living pressures that voters cited as crucial in exit polling.
The White House’s position adds complexity. If the President opposes a particular aid package, Congress would need a two-thirds majority in both chambers to override a veto, a threshold that is unlikely to be met on a contested aid bill even with Democratic majorities. Congress would therefore need to negotiate a package the President can sign, or use other levers — such as attaching aid provisions to must-pass legislation, using oversight hearings to build public pressure, or approving aid in stages — to move policy forward. The size of the House majority matters here: a wider majority gives Democratic leaders more flexibility to negotiate, while a narrower majority makes every Democratic vote more important and increases the leverage of members who are sceptical of aid or who want different conditions attached.
European allies will watch Ukraine aid votes closely, because American aid affects Ukraine’s ability to sustain its defence and its position in any negotiation. Reporting on Ukraine talks and on Zelensky’s Berlin visit illustrates how diplomatic efforts in Europe are intertwined with expectations about Washington. If Congress passes aid promptly, allies may feel more confident about their own support for Ukraine. If aid stalls in negotiations between Congress and the White House, allies may face pressure to fill gaps themselves, or to adjust their diplomatic strategy. The aid votes are therefore not only about money; they are about signalling American commitment and about the credibility of Western support for Ukraine as a whole.
Tariff authority is a second, distinct test. The President has used tariff powers under various statutes to impose duties on imports, arguing that tariffs protect American industry, raise revenue and give Washington leverage in negotiations. Congress has the constitutional power to regulate commerce, and it has in the past delegated broad tariff authority to the President, but it can also seek to reclaim that authority, to require congressional approval for new tariffs, to set time limits on emergency tariffs, or to use appropriations and oversight to constrain how tariffs are implemented. A Democratic Congress is more likely than its predecessor to pursue such measures, particularly where tariffs are seen as raising costs for American consumers and businesses.
That last point connects tariffs to domestic politics. Exit polling reported by Reuters and SSRS found that around nine in ten voters called the cost of living crucial or a major factor, and fuel and goods prices were part of that concern. Democrats can argue that tariffs function as a tax on consumers, raising prices for imported goods and for products that use imported components. Republicans who support the President’s tariff policy can argue that tariffs protect jobs, encourage domestic manufacturing and provide negotiating leverage that benefits American workers in the long run, even if short-term prices rise. A Democratic Congress that seeks to limit tariff authority will therefore face both a policy debate about trade and a political debate about who bears the costs of protectionism.
The legislative mechanics of tariff reform are difficult. A bill to require congressional approval for tariffs would need to pass the House and Senate and survive a presidential veto, unless it is attached to legislation the President cannot easily veto, such as a must-pass spending bill. Congress can also use the appropriations process to limit funding for tariff enforcement, or use hearings and investigations to challenge the legal basis for particular tariffs. Courts may also become involved, if businesses or other parties challenge tariff authority. The result is likely to be a prolonged struggle over trade powers, rather than a single decisive vote that settles the issue. Foreign trading partners, watching from abroad, will need to navigate that uncertainty, adjusting their own trade strategies while Washington debates its rules.
Democratic Congress foreign policy Ukraine tariffs Iran votes and war funding
Iran war funding is the third major test, and it is in some respects the most sensitive. Funding for military operations is provided through defence appropriations and supplemental bills, and Congress can debate the size, purpose and conditions of that funding. A Democratic Congress is expected to demand greater transparency about the costs, objectives and duration of American involvement, and to scrutinise requests for additional funding more closely than a Congress controlled by the President’s party. That scrutiny can take the form of hearings with defence and administration officials, requirements for regular reporting to Congress, limits on how funds can be used, and debates about whether Congress should pass a new authorisation for the use of military force.
The costs cited during the election period give that debate a domestic dimension. Moody’s was cited as estimating that the Iran war cost a typical household around 2,147 dollars, and Election Day fuel prices were reported at around 4.15 dollars per gallon for petrol and 6.29 dollars for diesel. Those figures were part of the broader cost-of-living story that voters cited as decisive. Democrats can argue that war funding should be weighed against domestic needs, including education, health care and infrastructure, and that Congress has a duty to ensure that military spending is justified and accountable. Supporters of the administration’s policy can argue that national security requires sustained funding, that withdrawing or limiting support would embolden adversaries, and that the costs of inaction would be greater than the costs of continued involvement. Both arguments will be made in Congress, and the outcome will depend on the details of funding requests and on the political dynamics within each party.
War powers present a particular constitutional challenge. The President, as commander-in-chief, has broad authority to direct military operations, but Congress has the power to declare war, to fund the military and to pass laws limiting military action. Efforts to use war powers resolutions to restrict American involvement have historically faced presidential vetoes and political divisions, even when they attract bipartisan support in principle. A Democratic Congress may be more willing to advance such resolutions, to debate them publicly and to force votes that put members on record, even if a veto override remains unlikely. Those votes matter politically, because they signal congressional opinion, shape public debate and influence how the administration justifies its policy, even when they do not immediately change operations on the ground.
NATO and alliance funding will also be part of the foreign policy agenda, although it overlaps with the Ukraine and tariff debates. Congress authorises and appropriates funding for American forces in Europe, for joint exercises, for military assistance to allies and for contributions to NATO common funding. A Democratic Congress is expected to support those items, and to use oversight to press the administration on alliance commitments. That support can reassure allies, but it also requires agreement with the Senate and the White House on overall defence spending levels, which are contested for domestic fiscal reasons as well as for foreign policy reasons. Defence budgets are therefore not decided in isolation; they are part of a larger negotiation about federal spending, deficits and priorities.
Another lever Congress holds is confirmation and oversight of administration officials. The Senate confirms ambassadors, senior defence and foreign policy officials, and other nominees, and it can delay or condition confirmations to extract policy commitments or information. The House, while it does not confirm nominees, can hold hearings, request documents and use its oversight powers to investigate administration decisions. Together, those tools give a Democratic Congress ways to influence foreign policy even when it cannot pass legislation over a veto. They also create friction, because the administration may resist congressional demands for information, leading to disputes that play out in public and in court.
Sanctions policy is a further area where Congress can act. Congress can pass sanctions legislation, can seek to lift or modify existing sanctions, and can use its voice to shape how the administration enforces sanctions regimes. Sanctions affect Russia, Iran, and other countries, and they interact with trade, energy and diplomatic negotiations. A Democratic Congress might pursue sanctions measures that the administration opposes, or oppose sanctions relief that the administration supports, creating another front in the divided-government struggle. As with aid and tariffs, the key question is whether Congress can assemble a veto-proof majority or negotiate a compromise, rather than simply passing a bill that will be vetoed.
The interaction between these foreign policy fights and domestic politics cannot be overstated. Voters in 2026 were primarily concerned with costs, jobs and everyday life, according to exit polling, and foreign policy debates that seem distant in Washington are often judged by voters through their effects on prices, jobs and security at home. Democrats who focus exclusively on foreign policy without connecting it to domestic concerns risk losing public support, while Republicans who dismiss congressional oversight as partisan obstruction risk appearing to ignore legitimate questions about spending and accountability. Successful congressional leaders in a divided government therefore frame foreign policy votes in terms that resonate domestically, linking Ukraine aid to American jobs in defence manufacturing, linking tariffs to consumer prices, and linking Iran war funding to household costs and fiscal responsibility.
Looking ahead, the sequence of votes will reveal how the new Congress intends to use its power. Early votes on aid, on tariff measures and on defence funding will signal whether Democratic leaders prioritise confrontation, negotiation or a mix of both. Votes that attract bipartisan support will be more likely to become law, while votes that are purely partisan may serve as messaging tools but are less likely to change policy. Over time, the pattern of those votes will show whether divided government produces gridlock, compromise or a shifting balance in which Congress gradually reasserts authority over foreign policy areas that have been dominated by the presidency in recent years.
None of this can be predicted with certainty before certification is complete and before the new Congress organises itself. The size of the House majority, the unity of the Democratic caucus, the willingness of some Republicans to break with the White House on specific issues, and the administration’s own strategy for dealing with Congress will all shape the outcome. What is certain is that the policy fights ahead — over Ukraine aid votes, over tariff authority, and over Iran war funding — will be among the most consequential tests of divided government in American foreign policy. They will determine not only how much money the United States spends abroad, but also how the world perceives American reliability, how allies plan their own policies, and how voters judge whether their representatives in Congress can check, shape and improve the foreign policy of the country they live in.
Sources
USN reviewed reporting from multiple outlets for this story. Read more from USA Today, Nikkei Asia and The Hindu.