Rep. Sean Casten (D-Il.) said late Saturday that President Trump’s move to bomb Iranian nuclear sites without congressional approval amounts to an “unambiguous impeachable offense.” “This is not about the merits of Iran’s nuclear program,” Casten said in a post on the social platform X. “No president has the authority to bomb another country that does not pose an imminent threat to the US without the approval of Congress. This is an unambiguous impeachable offense.”