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International Relations5 Nov 2026 · about 6 min

How US midterm election impacts rest of the world

The brief

The midterm result changed Washington's balance of power because Democrats captured both chambers of Congress. President Donald Trump could no longer rely on his party to control the legislative agenda. Democrats gained stronger oversight powers and more influence over spending, foreign policy, and trade debates. The change could affect several major issues. Democrats could propose new aid for Ukraine and intensify scrutiny of Israel's military operations in Iran, Gaza, and Lebanon. They could also try to limit Trump's use of tariff powers. However, many Democratic efforts could still face a presidential veto. The result does not give Democrats complete control over policy. They would need Republican support for major measures, including enough votes to override a veto. The elections may nevertheless pressure Trump to seek a peace deal with Iran, reconsider some trade threats, and respond to congressional demands on Ukraine and Israel.

01

What changed in the balance of power in Washington after the US midterm elections?

The midterm result changed Washington's balance of power because Democrats captured both chambers of Congress. President Donald Trump could no longer rely on his party to control the legislative agenda. Democrats gained stronger oversight powers and more influence over spending, foreign policy, and trade debates.

The change could affect several major issues. Democrats could propose new aid for Ukraine and intensify scrutiny of Israel's military operations in Iran, Gaza, and Lebanon. They could also try to limit Trump's use of tariff powers. However, many Democratic efforts could still face a presidential veto.

The result does not give Democrats complete control over policy. They would need Republican support for major measures, including enough votes to override a veto. The elections may nevertheless pressure Trump to seek a peace deal with Iran, reconsider some trade threats, and respond to congressional demands on Ukraine and Israel.

02

What are US midterm elections, and what does controlling the House of Representatives and the Senate allow a political party to do?

US midterm elections choose members of Congress roughly halfway through a president's four-year term. They elect all voting members of the House and about one-third of the Senate. Unlike a presidential election, they do not choose the president, but they can dramatically change the political balance in Washington.

The House of Representatives and Senate together make federal laws and approve government spending. A party controlling both chambers can decide which bills receive votes, lead congressional committees, conduct investigations, and use hearings to scrutinize presidential policies. Congress also has constitutional authority over commerce and import duties.

Control is not absolute. The president can veto legislation, and Senate rules and party divisions can slow action. In this case, Democratic control allowed proposals for more Ukraine aid and greater scrutiny of Israel, while efforts to limit Trump's tariff powers could face his veto.

03

How many congressional votes are needed to override a presidential veto, and why could that matter for new aid to Ukraine?

Congress needs a two-thirds majority in both chambers to override a president's veto. If all seats are filled and voting, that normally means 290 votes in the 435-member House and 67 votes in the 100-member Senate. The requirement is deliberately high, so bipartisan support is usually necessary.

This matters for Ukraine because Trump has largely halted direct US financial and military aid, even though many Democratic and Republican lawmakers support it. Democrats could introduce a new aid package after taking control of both chambers. If enough Republicans joined them, the package could reach the override threshold.

A successful override would make the aid law despite a presidential veto. The article warns that increased assistance would not arrive quickly. It also would not solve Ukraine's most urgent stated problem: a shortage of US-made Patriot interceptors protecting cities and energy infrastructure.

04

What consequences could the Democrats’ control of Congress have for US policy toward Iran, Israel, Ukraine and trade?

The election could reshape US policy across four fronts. On Iran, Gulf governments believe Trump may have more reason to seek peace, while Iran might see either an opportunity for a deal or a reason to escalate. On Israel, Democratic control could bring tougher congressional scrutiny of military operations and threaten established aid and weapons support.

On Ukraine, Democrats can propose new assistance, although Trump could veto it. A two-thirds vote in both chambers would be needed to override him. On trade, Congress could challenge tariff actions, but Democrats' efforts to limit presidential authority would probably face a veto.

The result therefore creates pressure more than immediate policy change. Oil markets already interpreted the vote as possibly improving US-Iran talks. Trade partners may delay investment pledges, China may gain perceived leverage, and India may find negotiations easier if Trump's ability to impose arbitrary tariffs weakens.

05

Why might Iran, Israel, Gulf governments, Ukraine, China, India and European countries respond differently to the election result?

The election affects these actors differently because their interests differ. Iran may believe Trump's weakened position makes a deal more likely, but it could also misread the result as weakness and escalate. Gulf governments see a stronger incentive for Trump to end the war. Israel faces possible scrutiny and threats to military aid, while Ukraine may gain congressional support.

Trade produces different calculations. China could gain perceived leverage in negotiations, while broad US-China relations may remain fragile but stable. India could benefit if Trump has less freedom to impose tariffs during trade-deal talks. European countries must consider whether US tariff threats will continue, including a possible 100% tariff linked to digital services taxes.

None of these outcomes is automatic. Trump retains veto power, and Democrats need Republican support for major changes. The article therefore presents the election as a new source of pressure, uncertainty, and bargaining power rather than a settled policy reversal.

06

Why can a US election affect crude oil prices and fuel costs around the world?

A US election can affect energy prices when it changes expectations about a major conflict. The article says the Iran war has choked crude oil and liquefied natural gas supplies from the Gulf. Less available energy can push up crude prices, which can then raise fuel costs around the world.

Markets also trade on expectations, not only current supply. After the midterms, traders wagered that Trump might pursue US-Iran peace talks more seriously. Oil prices fell for a third day as the market considered the possibility that the war could end. Tight stock levels limited the size of that decline.

The price effect therefore depends on both diplomacy and physical supplies. A credible peace process could reduce fears of prolonged disruption and lower prices. A new military escalation could tighten supplies further and put renewed pressure on fuel pumps, though the article does not predict a definite outcome.

07

How do Congress’s constitutional powers over commerce and import duties limit a president’s ability to impose tariffs?

The Constitution gives Congress power over commerce and import duties. That means Congress establishes the basic legal framework for tariffs and can decide how much authority to delegate to the president. A president may act under existing laws, but those actions remain connected to powers Congress created or retained.

The article says Trump used laws involving national security and unfair trade practices to impose tariffs. Democrats could try to limit that route by passing new restrictions or requiring congressional approval for more trade actions. Such a law could reduce the president's ability to impose tariffs unilaterally.

The practical limit is political. Any bill changing tariff authority would need to pass both chambers and receive the president's signature, unless Congress could override a veto with two-thirds support in each chamber. The article says Democratic efforts to limit Trump's power would likely face a presidential veto.

This brief was written by AI from the original reporting and checked by other models. Names, figures and quotes come from the source; read it for full context.

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