Ohio Gov. John Kasich, who won the winner-takes-all-delegates primary contest in his home state on Tuesday, shifted his campaign efforts to Pennsylvania, where he talked to students at Villanova University.

“Everything in the world is changing,” Kasich said in references to several issues, including energy. He defended his belief that human activity contributes to climate change.

“I have the right to shape what it means to me to be a conservative,” the governor said.