I get it. He's worried that a Muslim would place their religious beliefs and loyalties above the US Constitution. That's the same reason I worry about having a Christian in charge of this nation. Later, when asked to clarify, Dr. Carson said that he guessed it would be okay as long as the Muslim candidate renounced Sharia law. I had thought Carson was stupid, but he's on to something. It would be okay as long as the Christian renounced Biblical law.
Please please please intelligent moderate and conservative Republicans: Start throwing your voices, support, and money behind your other candidates who are less about hate, ego, and pandering to extremists and more about rational political debate and philosophy. I may not agree with your politics, but if your more rational candidates don't get more support soon, they are not going to be able to continue their campaigns and you're going to have a Bozo (or Bozette) representing you in the next election. That's a danger we just can't risk.