Donald Trump questioned Hillary Clinton's faith at a closed meeting. | Getty Trump on Clinton's faith: 'We don't know anything'

Donald Trump questioned his Democratic opponent’s Christian faith Tuesday, telling a closed meeting with top Christian leaders that “we don’t know anything about Hillary in terms of religion.”

“Now, she's been in the public eye for years and years, and yet there's no -- there's nothing out there. There's like nothing out there,” the presumptive Republican nominee said in a video released on Twitter by Virginia Christian conservative (and former Senate candidate) E.W. Jackson.


“It's going to be an extension of Obama but it's going to be worse, because with Obama you had your guard up; with Hillary you don't, and it's going to be worse,” Trump added on Tuesday.

He also criticized politicians' handling of religious matters, particularly relating to Evangelicals and Christianity.

“All of your leaders are selling Christianity down the tubes, selling the Evangelicals down the tubes. And it's a very, very, uh, very, very bad thing that's happening," Trump said.

But Clinton has previously said she is Methodist and has talked on various occasions about her religion, including on the campaign trail.

Evangelical leader Deborah Fikes, who also announced her endorsement of Clinton on Tuesday, weighed in on Mr. Trump's comments in a statement, saying his proposals "are not just un-Christian-- they are un-American."

"In my personal capacity of working with over 130 National Evangelical Alliances around the globe, ‘Sister Hillary’ as she is often called, is embraced by many Evangelical sister churches as a trustworthy and respected political leader because she lives the Golden Rule in her private life and in her public policies," Fikes added.

Katrina Pierson, spokesperson for Trump's campaign, told MSNBC that his comments were referring to the "double standard," since his religion "has been questioned along the campaign trail."

"We are talking about the Democratic party, a party that voted God out of their actual platform nationally so I think that is interesting and considering how we have people all over the globe, Christians being beheaded, and yet here in the United States, this administration, the Clinton/Obama policy of political correctness, essentially not even wanting to talk and say what's going on, that's happening to Christians all across the country," Pierson added, referencing the vote Democrats made at their 2012 convention to keep "God" out of their platform, which was quickly reversed.