President Donald Trump announced Saturday evening that the United States military carried out airstrikes on three Iranian nuclear sites, joining Israel’s bombing campaign in an effort to cripple Tehran’s ability to build a nuclear weapon.

After nearly two years of stark divisions over the war in Gaza and support for Israel, Democrats seemed at odds over policy toward Iran as progressives demanded unified opposition before President Donald Trump announced U.S. strikes against Tehran’s nuclear program. Party leaders were treading more cautiously.

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