Whatever he's doing on tour, all the questions still center around him being on the campaign. His gaining closer ground on Donald Trump, so I understand that the campaign may have those concerns, but it doesn't change much for Dr. Carson.
At this point he has no interest in being in politics ... none, i think Trump is looking for someone with government experience, someone who is more political.
There are things that Dr. Carson has said in the past equating Obamacare to slavery has not gone over well in that community.