President Barack Obama's faith is continuing to raise debate following criticism from GOP presidential candidate Rick Santorum that the president's agenda promotes "phony theology" not based on the Bible.
Tuesday on MSNBC's "Morning Joe," Rev. Franklin Graham was asked if he believes Obama is a Christian.
Graham, who is the son of evangelist Billy Graham, said he takes the president at his word, but that people also need to understand what it means to be Christian.
"I have no idea what he really believes," Graham said. "For me, the definition of a Christian is whether we have given our life to Christ and are following Him in faith, and we have trusted Him as our Lord and Savior."
Graham was then asked about the president's connection to Islam. He suggested that Obama could be considered a Muslim.
"Under Sharia law, Islam sees him as a son of Islam because his father was a Muslim, his grandfather was a Muslim, his great grandfather was a Muslim," Graham responded. "So under Islamic law, the Muslim world sees Barack Obama as a Muslim, as a son of Islam. That's just the way it works."
"But of course he says he didn't grow up that way," Graham continued. "[He says] he didn't believe in that. He believes in Jesus Christ, so I accept that."
Graham called the president "an incredible man," but also expressed concern that Obama is not as outspoken as he could be on the persecution of Christians worldwide.
"[He] seems to be more concerned about" the Muslims than the "Christians that are being murdered in the Muslim countries," Graham said. "...He could be speaking to these countries now, demanding that they protect the Christians."
Graham went on to say he believes presidential candidates Rick Santorum and Newt Gingrich are Christians. When asked about former Gov. Mitt Romney he said, "Most Christians would not recognize Mormonism as part of the Christian faith."
Meanwhile, White House Spokesman Jay Carney said the president is continuing to focus on the economy, rather than on what people are currently saying about his faith.
President Obama has continuously said that he's a Christian. In a speech at this month's National Prayer Breakfast, Obama said prayer is important in his life and that he reads devotions and daily scriptures.