House Democrats are weighing whether or how the 25th Amendment might be used to remove President Trump after his recent threat to wipe out the entire Iranian "civilization." Why it matters: The effort faces steep legal and political hurdles — and would require buy-in from Trump's own Cabinet.

Several lawmakers, Democratic and Republican, have called for the 25th Amendment to be invoked against Donald Trump. But what is it?

Lawmakers, political figures, and more are calling for the 25th Amendment to be invoked after President Trump threatened to escalate the war in Iran.