South Carolina Senator Lindsey Graham incited the fury of President Donald Trump’s most fervent supporters after describing the president’s decision to pardon more than 1500 Jan. 6 insurrectionists as a “mistake”—with one former prisoner slamming Graham as a “Republican in name only.

Trump pardoned about 1,500 people who were charged for their actions during the Jan. 6 Capitol riot. That number includes 172 who pleaded guilty to assaulting law enforcement officers. Graham, however, points out that Trump said he would grant the pardons if he was reelected.