Former Republican presidential candidate Ben Carson has endorsed Donald Trump for president.
The retired neurosurgeon joins the ranks of businesswoman Carly Fiorina and New Jersey governor Chris Christie in endorsing the controversial Trump, after they themselves dropped out of the race.
Mr. Carson said he's seen "two Donald Trumps" - one who is bombastic on the stage, and the other who is more cerebral.
IN: "I've come..."
OUT: ...means it."
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