Sen. Lindsey Graham addressed the “send her back” chants directed at Rep. Ilhan Omar, D-Minn., during President Trump’s Wednesday North Carolina rally and the ongoing fight between the progressive freshmen members of Congress and the president on Thursday morning.

The chant was the latest in a nearly week-old feud that began with the president calling on her and Reps. Alexandria Ocasio-Cortez of New York, Rashida Tlaib of Michigan, and Ayanna Pressley of Masschusetts to “go back” to their native countries if they’re unhappy with the current status in the United States. Omar is the only one of the four who was born outside of the U.S. but is an American citizen.