As Barack, 63, Bill, 78, and Hillary, 77, entered the U.S. Capitol rotunda in Washington, D.C., on Monday for the 78-year-old’s historic swearing-in ceremony, people at the Capitol One Arena could be heard loudly booing.

Former Vice President Mike Pence is in attendance at Trump’s inauguration, his wife, former second lady Karen, is not. Karen Pence snubbed the Trumps earlier this month at Carter’s funeral, where she ignored Melania Trump’s efforts to shake her hand.