US President Donald Trump has backed Defence Secretary Pete Hegseth, a day after Democrats ‌won control of both chambers of Congress in midterm elections that reflected voter anger over the Iran war.

Asked on Wednesday (local time) whether he was considering replacing Hegseth, whom he has described as a champion of the war, Trump said: “No, I ‌think he’s doing a very good job.”

The response contrasted with then-president George Bush, who fired defence secretary Donald Rumsfeld the morning after the 2006 midterms, when voter discontent over the Iraq war helped Democrats win control of Congress.

But sources said ‌Trump could still replace Hegseth as Republicans assessed their losses.

One Trump adviser said Hegseth “could be on the chopping block” because of the war.

“Someone is going to get blamed for this and you know it’s not going to be him (Trump),” the adviser said.

Sources say Donald Trump could replace Pete Hegseth as Republicans assess their losses. Photo: AAP

Trump has described Hegseth as a key proponent of the unpopular conflict, saying on March 23: “Pete, I think you were the first one to speak up, and you said, ‘Let’s do it, because you can’t let them have a nuclear weapon’.”

On Wednesday, Vice President JD Vance publicly questioned whether the Iran war was worth it and said it cost Republicans control of Congress.

Asked for comment, the White House referred Reuters to Trump’s public remarks on Hegseth.

The Defence Department said Hegseth was “100 per cent committed” ‌to leading the Pentagon ‌until the end of Trump’s term in the White House on January 20, 2029.

Hegseth has been a polarising figure in American politics and has made enemies even within his own Republican Party. One Republican ​lawmaker, US Representative Thomas Massie, even filed articles of impeachment against him earlier in 2026, accusing him of abusing his office by launching hostilities against Iran without approval by Congress.

Democrats have promised to investigate Hegseth and his handling of the Pentagon. Aides ⁠say that could include everything from his handling of the Iran war to his purges of top military officers, including the chairman ‌of the Joint Chiefs of Staff.

He ​could also face scrutiny over his Ukraine policy and US military strikes on suspected drug trafficking boats in Latin American waters, which some Democrats say could amount to war crimes.

One long-rumoured possibility for Hegseth would be filling the Senate seat that will be vacated by Senator Marsha Blackburn. She was elected on Tuesday to become Tennessee’s next governor starting in January.

Trump has regularly ​praised Hegseth publicly, and has given the former Army National Guard soldier significant leeway as he sought to reshape the Pentagon. But last month, Trump publicly split with Hegseth by pulling the plug on his plans to livestream ​the Army’s firing-squad execution of Fort Hood shooter Nidal Hasan.

Many fellow ⁠Republicans, along with religious leaders and international observers, raised objections to the plan. Defence officials privately expressed relief that the livestreaming would not go forward.

-AAP