Bill Clinton is not the only former president to hit the campaign trail. Former President George W. Bush returned to the spotlight Monday to campaign for his brother Jeb in South Carolina.

George W. Bush: “This is a serious election for a serious job. So please welcome a serious and thoughtful candidate, a good man, a man I am proud to call my big little brother: Jeb Bush.”

George W. Bush’s appearance came after Donald Trump slammed the former president for invading Iraq, calling the war a “big, fat mistake” and saying Bush lied about it.