The HUD secretary said it was important to take the high road.
An aide to the former presidential contender had said Carson initially removed himself from consideration due to inexperience.
Trump's transition team doubles down on Taiwan call, terming it a "courtesy."
Carson said voting Clinton into office would be something "America may never recover from."
The 2016 presidential election has already been off the charts in terms of the bizarre.
It's electile dysfunction, ranked.
Trump is busting ideological barriers. It's a political winner.
The candidates met Thursday in Detroit, which is 70 miles from the ongoing water crisis in Flint, Michigan.
The forum is the first since Donald Trump scored multi-state wins on Super Tuesday.
The retired neurosurgeon failed to win any state that voted on Super Tuesday.
Carson camp says candidate faces pressure to drop out on Super Tuesday.
Republicans Donald Trump, Ted Cruz, Marco Rubio, John Kasich and Ben Carson meet for the final debate before Super Tuesday.
The forum is the only debate sanctioned by the Republican National Committee to be aired by a Spanish-language network.
Front-runner Donald Trump seems poised to land his third consecutive win in Nevada on Tuesday night.
Republican candidates called each other liars at a debate that saw little consensus, except on delaying a Supreme Court nomination.
Former Virginia Governor Jim Gilmore is the only GOP candidate who didn’t earn a spot onstage.
The Washington Post reported that Carson planned to eliminate 50 staff positions, or nearly one-half his staff.