White House chief of staff Denis McDonough told David Axelrod on his podcast "The Axe Files" on Wednesday that President Obama is the most Catholic president in U.S. history during a conversation on faith and politics.

Axelrod, who formerly served as Obama's senior adviser in the White House, told McDonough that the president often talked about being raised in a spiritual tradition versus a religious tradition and that he later adopted his faith when he was older living in Chicago.

"Look, I say to him, Axe, and I think I've said this to him in your presence and I've said this publicly before, I think this is our most Catholic of presidents," McDonough said. "And I mean that by capital ‘C' Catholic in what I see and what he does everyday."

"It's not to say that he does everything entirely consistent with Catholic teaching," McDonough said. "That's not the idea, but I think in fact his view of the person and our role and the view of us as adding to the common good is an undeniably Catholic set of premises, and that's why I say that to him a lot."

Obama has been staunchly pro-choice on the issue of abortion, which conflicts with the Catholic Church's teachings. His signature health care law, the Affordable Care Act, faced strong resistance from the country's Roman Catholic bishops because it requires religious organizations to provide insurance with free birth control, which also goes against church doctrine. The president often relied on Catholic members of the administration like Vice President Joe Biden and former Secretary of Health and Human Services Kathleen Sebelius in rallying support for Obamacare, the New York Times previously reported.