President Donald Trump announced Saturday evening that US military forces had dropped bombs on three Iranian nuclear facilities, ending a weeklong deliberation period over joining Israel’s campaign against Tehran and thrusting the United States squarely into an escalating Middle East conflict.

Congressional leaders expressed surprise Saturday night about President Donald Trump's announcement he had ordered a U.S. attacked on three Iranian nuclear sites, with some Republicans praising the move and some Democrats questioning the president's authority.

The move comes after Iran and Israel have been engaged in aerial strikes and Trump had been pondering US involvement for the past week.