US Republican Ben Carson has officially ended his campaign for the presidential nomination in the 2016 election. Carson, a retired neurosurgeon, had been a frontrunner but his campaign stalled in recent months after he performed badly on foreign affairs and questions about his background story, BBC reported. He has not said which of the remaining four candidates he plans to endorse in the race for the Republican nomination. Carson had earned only eight delegates before his decision to drop out from the nomination race.
