Donald Trump today: "No leader, especially a religious leader, should have the right to question another man’s religion or faith."
Donald Trump previously:
2/12/16: TRUMP: 'How can Ted Cruz be an evangelical Christian when he lies so much and is so dishonest?'
12/14/15: Donald Trump Questions Ted Cruz's Evangelical Faith
9/18/15: Donald Trump's history of suggesting Obama is a Muslim (many examples, going back years, such as suggesting in 2011 that Barack Obama's birth certificate might say he's a Muslim)
9/18/15: Donald Trump fails to correct man calling Obama a Muslim and 'not even American' – video
9/27/12: Donald Trump tweet -- "Does Madonna know something we all don't about Barack? At a concert she said 'we have a black Muslim in the White House.'"
P.S. It's worth noting that "JEB" Bush, who the corporate media likes to claim is some sort of moderate, the sane one in the wacko 2016 GOP presidential field, answered "no" to the question of whether Trump's a Christian a few weeks ago.