US Midterm Results 2026: What a Democratic Congress Means for Oil Prices and the Iran War

What happened in the 2026 midterm elections?

Democrats won control of both chambers of Congress on 3 November. The Associated Press called the Senate for the party late on election night, describing the result as a decisive rebuke driven by frustration over high prices, the war in Iran and concerns about government corruption ^[1]. Democrats needed a net gain of four Senate seats and three House seats ^[1].

The Senate gains came through some of the most conservative states in the country. James Talarico defeated Ken Paxton in Texas, Annie Andrews beat Darline Graham in South Carolina, Adam Hamilton unseated Roger Marshall in Kansas, Josh Turek won in Iowa, Sherrod Brown beat Jon Husted in Ohio and Roy Cooper took the open seat in North Carolina ^[1]. Reuters counted six Republican Senate seats flipped ^[2]. Middle East Eye also counted Maine, where Troy Jackson defeated Susan Collins, and put the new Democratic majority at 53 seats ^[10].

In the House, ABC News reported that about two dozen seats flipped to Democrats, including districts in Kentucky, Missouri and Iowa ^[3]. Middle East Eye counted 220 Democratic seats by early Wednesday, above the 218 needed for a majority ^[10].

President Trump said he would accept the results and work with Democrats, while promising to veto legislation he opposes ^[3]. In an interview with Fox News he said the war had weighed on his party: "I think a part of it was Iran, but at the same time people understood the importance of what I've done with Iran" ^[2].

How did oil prices react to the election results?

The reaction was muted, because markets had largely expected a Democratic House ^[8]. Brent futures rose 82 cents to $104.42 a barrel early on 4 November, and West Texas Intermediate gained 50 cents to $96.59, reversing earlier losses ^[4]. A day earlier Brent had settled at its lowest level in nearly four weeks as traders weighed talks to end the wars in Ukraine and Iran ^[4].

Priyanka Sachdeva of Phillip Nova told Reuters that conflicting signals from Washington, with strikes continuing alongside statements that played down escalation, made it hard for traders to take a strong view ^[4]. She added that supply risks around the Strait of Hormuz had not gone away ^[4]. An unexpected 5.27 million barrel fall in US crude stocks also supported prices ^[4].

The bigger move came before the vote. Brent fell 7% on 2 November to below $106, its lowest since mid-October, after President Trump signalled interest in a diplomatic end to the war ^[5]. It had been close to $118 the previous week ^[5].

The chart shows how closely Brent has followed the war. It rose from $72.48 on 28 February to $112.57 by 27 March, a gain of about 55% ^[6]. It then fell to $71.57 on 1 July during a ceasefire, before rising again above $100 when fighting resumed ^[6]. The election is a new input, but the war is still the main driver.

Why do the midterms matter for the Iran war and the Strait of Hormuz?

The war began on 28 February, when the United States and Israel struck Iran. The administration has argued that it does not need congressional approval to continue it ^[7]. Al-Monitor reports that House Democrats are expected to challenge that position. The House has repeatedly voted for war powers resolutions to limit operations against Iran, and the Senate passed its own version in June ^[7].

A Democratic Congress gives those efforts more weight. The new majorities can hold hearings, subpoena officials and use the budget process to restrict funding, and Middle East Eye notes that Senate Democrats can now block funding for the war ^[10]. A senior congressional aide told Al-Monitor that ending and investigating the war would be "top of the list" for House Democrats ^[7]. The president keeps his veto, however, and overriding it needs two-thirds of both chambers ^[3].

Diplomacy is moving at the same time. Reuters reports that Qatar has stepped up mediation to prevent new attacks after the election, though a senior Iranian official said the two sides remain far from a deal ^[4]. Before the vote, XTB's Kathleen Brooks said a Democratic Congress could speed up a resolution, which could push oil below $100 ^[5].

For physical oil markets, the real question is the Strait of Hormuz. IndraStra, citing broker research, says it could take about four months after the strait reopens to restore 75% of the Middle East oil production that has been lost ^[9]. This is why we do not expect a political change in Washington to bring prices down quickly. Our Hormuz shipping tracker follows tanker movements through the strait.

What can a Democratic Congress actually change in energy policy?

On energy, Congress has fewer tools than the White House. Before the vote, TD Securities analysts quoted by IG expected the midterms to be "more about oversight and managing volatility" than sweeping new laws ^[8]. The White House keeps control of trade, tariffs and most energy policy ^[8].

The areas most likely to change are:

• Oversight. Expect hearings on fuel prices, oil company profits, the war's costs and decisions on releases from the Strategic Petroleum Reserve ^[8].
• Permitting and drilling. The administration's "drill baby drill" agenda depends mainly on executive action, but Congress can delay or attach conditions to related spending ^[8].
• Sanctions. CES Intelligence notes that the Iran sanctions structure, the China trade truce and Ukraine mediation all fall within the 90 days after the election ^[11].
• Funding deadlines. Government funding expires on 11 December and the new Congress is sworn in on 3 January ^[11].

Gasoline prices: the issue that linked the war to the ballot

Energy prices were central to the campaign. IG reported that the national average gasoline price had reached $4.56 a gallon, with about $6.00 in some Western states. It also said diesel prices had risen nearly 70% since February ^[8]. In late October, Mother Jones put the national average at about $4.30, compared with $3.47 on average under the previous administration ^[12]. Moody's estimated that higher fuel prices, airfares and mortgage rates had cost each household about $2,000 ^[12].

In the national exit poll, 87% of voters said they were very or somewhat concerned about gasoline prices ^[13]. Analysts from different political positions drew the same connection between the war, prices at the pump and the vote ^[14]. We look at that evidence in detail in our analysis of the exit polls.

Three scenarios for oil after the midterms

These scenarios are our own framework, built on the sources above. They are not forecasts of political events.

1. Negotiated de-escalation. Congressional pressure and Qatari mediation lead to a durable ceasefire and a phased reopening of Hormuz. Brent could fall below $100, as XTB suggested ^[5]. Because restoring lost production takes time, the decline would probably happen gradually over months ^[9].
2. Stalemate. Talks stall, limited strikes continue and Congress passes measures that are vetoed. Brent would probably stay between $95 and $115, moving with each report from Hormuz, as it has since July ^[6].
3. Escalation. The administration resumes major combat despite the new Congress. Brent could return to its March high of $118 or above ^[6]. The Indian brokerage Emkay, quoted by IndraStra, argued before the vote that oil prices were unlikely to fall after the midterms ^[9].

For buyers in Europe, Türkiye and Asia, our advice is the same as before the vote. Hedge freight and insurance exposure, and do not assume that a political change in Washington will quickly change physical supply. Our Brent price forecast for 2027 sets out the longer-term picture.

What to watch

• War powers votes in January. The first test of the new majorities ^[7].
• Qatar and Pakistan mediation. Any signal that the Doha talks are advancing ^[15].
• EIA weekly inventories. Further unexpected draws would support prices whatever the politics ^[4].
• 11 December funding deadline. A possible point for Congress to apply pressure over war spending ^[11].