Rep. Alan Grayson, D-Fla., a member of Hillary Clinton’s “Florida Leadership Council,” announced on Monday that he would switch his support to Bernie Sanders after the Vermont senator overwhelmingly won an online poll the congressman conducted.

“Now, after listening to We, the People, I feel the Bern,” Grayson wrote in his endorsement. “I will vote for him as a super-delegate at the Democratic National Convention. And I enthusiastically join, shoulder to shoulder, his political revolution.”