WASHINGTON (AP) —

    As his critics grew louder, Republican White House contender Ben Carson retreated slightly late Monday from his weekend charge that Muslims shouldn't serve in the presidency.
In an interview with Fox News, Carson said he would be open to a moderate Muslim who denounced radical Islam as a White House candidate. But he also said he stood by his original comments, saying the country cannot elect people "whose faith might interfere with carrying out the duties of the Constitution."
    "If you're a Christian and you're running for president and you want to make this into a theocracy, I'm not going to support you," Carson told Fox News host Sean Hannity in an interview to be broadcast later Monday. "I'm not going to advocate you being the president." Carson said members of the Islamic faith who are willing to accept the American way of life "will be considered infidels and heretics, but at least then I will be quite willing to support them."
    The intensifying political fallout is a distraction at least as the retired neurosurgeon tries to capitalize on recent momentum in the unruly GOP field. But it also highlights a sentiment among voters in both parties who agree with Carson's reluctance to elect a Muslim to the nation's highest office.
    Carson's campaign reported strong fundraising and more than 100,000 new Facebook friends in the 24 hours after he told NBC's "Meet the Press" on Sunday: "I would not advocate that we put a Muslim in charge of this nation." His campaign manager Barry Bennett told The Associated Press on Monday: "While the left wing is huffing and puffing over it, Republican primary voters are with us at least 80-20."
    The head of the nation's largest Muslim advocacy group called on Carson to drop out of the 2016 presidential contest during a Capitol Hill press conference on Monday, declaring him "unfit to lead because his views are in contradiction with the United States Constitution."
    "Not long ago, some people thought that a Catholic cannot be a president, an African-American cannot be a president," said Nihad Awad, executive director of the Council on American-Islamic relations. "They were wrong then, and they are wrong now." He cited Article 6 in the Constitution, which states, "no religious test shall ever be required as a qualification to any office or public trust under the United States."
    While the law is clear, the politics of Muslim culture in America are not. Fourteen years after Islamic extremists executed the deadliest terrorist attack in U.S. history, a suspicious stance resonates with some voters despite the fact that — as Democratic Sen. Harry Reid put it Monday — "they teach in our schools, fight in our military and serve in Congress."
    A June Gallup poll found that 54 percent of Republicans would not vote for a well-qualified Muslim nominee from their own party; 39 percent of independents and 27 percent of Democrats said the same. Indeed, conservatives have repeatedly embraced anti-Muslim sentiment in recent years. They have consistently tried to link President Barack Obama to Islam throughout his presidency, using imaginary religious ties.
    Republican front-runner Donald Trump declined last week to correct a voter who inaccurately stated that Obama is a Muslim. For Trump, the election of a Muslim president was "something that could happen. Would I be comfortable? I don't know if we have to address it right now."