Trump Checkmated on Iran

Donald Trump may ignore the non-binding US House resolution, but he risks endangering himself if he persists in attacking Iran without the approval of the legislative branch.

President Donald Trump has faced a heavy blow domestically after the US House of Representatives, controlled by his own Republican Party, passed a resolution to obstruct Trump from continuing a war against Iran.

The resolution, supported by 215 House members and opposed by 208 legislators, requires President Trump to obtain approval from the House before proceeding with war against Iran.

Four Republican legislators—Thomas Massie, Brian Fitzpatrick, Warren Davidson, and Tom Barrett—all from swing states, defected to support the resolution proposed by Democratic members of Congress.

The fact that these four Republican legislators hail from swing states, which are always decisive in US elections, suggests there may be significant changes in the electoral map during the November midterms. Such changes could alter the configuration of power in the legislature, which will ultimately determine the fate of the Trump administration.

The resolution itself will be forwarded to the upper house, the Senate, where there are also Republican senators with a history of defying Trump.

One month ago, four Republican senators broke away from Trump to support a Democratic initiative requiring Trump to seek authorisation from the legislature before attacking Iran.

While the House resolution does not require the US President’s signature and is not binding on Trump, the fact that several Republican House members supported it reveals the bitter reality that Trump’s political project in Iran lacks the support of his own political allies.

The resolution also affirms recent US public opinion, which generally opposes war against Iran, particularly due to its unclear objectives and the negative impact on the US national economy.

Various polls reinforce this fact, including the University of Maryland Critical Issues Poll conducted from 15–21 May 2026.

According to the poll, 56 per cent of Americans believe a war with Iran would bring more negative than positive impacts to the US people. Only 12 per cent of US citizens believe otherwise.

Even more striking is that only 16 per cent of respondents stated that the US has won the war against Iran.

That figure is far lower than the number of respondents stating that the US has not won the war, which reached 38 per cent.