WASHINGTON: Democrats vowed on Wednesday to use their resounding midterm victory to rein in President Donald Trump, setting up two years of possible deadlock in Washington, as Trump spent his first post-election appearance showing off his under-construction White House ballroom.

A wave of anger over Trump's policies, particularly the US-Iran war's role in pushing the cost of living higher, helped Democrats take the Senate, where they flipped seats in deeply Republican states for a majority of at least 54-44. Democrats also gained at least 30 seats in the House of Representatives.

It will be the first time that Trump, a Republican who also held the White House from 2017 to 2021, has had to contend with a Democratic-controlled Congress in both chambers.