(Radio Iowa) — Former South Carolina Governor Mark Sanford announced Sunday that he is challenging President Trump’s bid for reelection. Sanford says it’s time for a debate about what it means to be a Republican. “As a Republican Party, we’ve lost some of our ways,” Sanford said. Sanford says Trump has embraced protectionism when it comes to trade and is leading the party to disregard scientific evidence that the climate is changing. “As to my primary beef, I think it is, in fact, the degree to which he has called himself ‘The King of Debt’ and has led the party in the wrong direction on debt and spending,” Sanford said.

Sanford has been a long-time supporter of tougher immigration measures, including construction of a wall along the southern border and penalties against businesses who hire people who entered the country illegally. Sanford says Trump “is good at recognizing problems,” but tends to make situations worse. “And I think there are real questions of tone and humility and adherence to truth that I think cause people to doubt what he says next,” Sanford says, “which then undermines our standing in the world and domestically.”

Sanford made his comments during this weekend’s “Iowa Press” program on Iowa Public Television. Former Illinois Congressman Joe Walsh and former Massachusetts Governor Bill Weld have also said they intend to challenge Trump in G-O-P primaries and caucuses.