That is a lie. Bald faced lie.
??
https://www.facebook.com/notes/the-conservative-minuteman/what-happened-with-dr-carson-in-iowa-from-some-one-that-was-there-and-involved/1651295951761896
http://politistick.com/uh-oh-was-marco-rubio-guilty-in-the-ben-carson-dropout-rumor/