Ben Carson, is ending his White House bid, is declining to endorse any candidate for the Republican nomination, though he says he has ``talked to all of them this week.''

Speaking to a gathering of conservative activists in suburban Maryland, the retired neurosurgeon says the United States needs ``trickle-down ethics.'' He says the ideal presidential candidate is ethical and accomplished, has clear policies and treats others well. He says whoever can check all of those boxes would be a ``great leader.''

Carson reiterated that he is leaving the campaign trail, something he announced on his Facebook page the day after Super Tuesday contests.

The Conservative Political Action Conference crowd gave him an adoring standing ovation. He says there are ``a lot of people who love me, they just won't vote for me.''

Carson has agreed to become the national chairman of My Faith Votes. It's a nonpartisan group aimed at getting more Christian voters to the polls.  (Associated Press)

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