Presidential hopeful and South Bend, Ind., Mayor Pete Buttigieg wondered about the sincerity of President Trump’s faith in a recent interview.

Buttigieg, 37, has had a surge of attention as people begin to learn more about the mayor. Buttigieg, who is gay and married, is an Episcopalian who considers himself to be religious. He told USA Today that he was not sure about the president’s faith, though.