svg]:overflow-visible">Listen to article • 0:00 minWASHINGTON — Doug Mastriano, the far-right Pennsylvania lawmaker whom President Donald Trump nominated to become the U.S. ambassador to Slovakia, refused to tell senators during his confirmation hearing on Thursday whether he believes all American political leaders should be Christian.A key Trump ally during the president’s attempt to overturn the 2020 election, Mastriano also rejected claims that he is a conspiracy theorist who assisted in the Jan. 6, 2021, attack on the U.S. Capitol. And while he said he regretted some of his past statements about the Holocaust and his associations with individuals considered antisemitic, he...