March 2, 2016
Dr. Ben Carson "doesn't see a political path forward", CNN is reporting. Carson will not participate in Thursday's Republican debate in Detroit and will discuss his future during a CPAC speech on Friday.
A statement to this effect appears on the Carson campaign website.
Carson won just 3 delegates on Super Tuesday and those were associated with a 5th place finish in Virginia. Once near the top of the polls, Carson saw most of his support evaporate (often to the benefit of Ted Cruz) late in 2015.