Here’s another link from that page:
http://www.newsmax.com/Politics/ben-carson-confirms-house-speaker/2016/01/08/id/708768/
Carson knows full well he isn’t going to be elected president.
He apparently toyed with the idea of the House Speakership—which a) wouldn’t have happened and b) he’d have absolutely been eaten alive in.
But he also may be interested in Congress—which is the level he should have aimed for all along.
Analogously, Fiorina should have run for California state assembly where she could have built a track record; instead, she ran for Senate against Boxer first time out, got taken down with a single attack ad, and decided to run for POTUS.