Franklin Graham would not vote for a Muslim or an atheist to take a position in public office, he told Fox Radio.
Graham, the son of evangelist Billy Graham, made the comments in a wide ranging interview on Tuesday's The Alan Colmes Show. He condoned the comments made by Republican presidential candidate Ben Carson, who said a Muslim should not be elected to President of the United States.
"I understand what Ben Carson was saying," said Graham. "Because the teaching of Islam goes against our Constitution."
When pressed on whether he would ever vote for a Muslim to hold public office, Graham said he didn't see how he could.
Carson, who is currently coming second to Donald Trump in the polls to be the Republican presidential candidate, recently said he did not think Islam was consistent with the American constitution.
"I would not advocate that we put a Muslim in charge of this nation," he said on NBC's show, Meet the Press.
"I absolutely would not agree with that," he added.
Graham went one further yesterday by adding that he "wouldn't want to vote for an atheist" to hold public office either.
However, he said he would not see a problem with voting for a Jew. Asked whether he could see himself voting for a Jewish person, Graham replied, "of course."
In addition to Carson's recent comments, Graham discussed the Pope's visit to America, the Syrian refugee crisis and the nature of hell with Fox's Alan Colmes.