Donald Trump strong-armed Republican senators into rejecting a bill that would have forced him to end the Iran war after erupting at lawmakers in a closed-door meeting for daring to rein in his power.

The President pressured two of his most outspoken critics, Senators Rand Paul and Bill Cassidy, to shoot down a Democratic-led resolution Wednesday night that would have forced Trump to seek congressional approval to continue the war in Iran.

Four Republican senators had previously backed a similar resolution aimed at curbing Trump's war powers, setting off an explosive closed-door screaming match between the President and Republican lawmakers.

Behind closed doors on Capitol Hill, Trump confronted Senate Republicans over their rebellion as Senator Cassidy tried to explain their reasoning. The President hurled personal insults, calling him a 'lunatic' and ordering him to 'sit down.' 

When Cassidy refused and called Trump 'brother,' the President shot back that he wasn't his brother and mocked the senator over his recent primary loss, which Cassidy took as a deliberate attempt to bully him.