Republican Governor Scott Walker of Wisconsin abruptly pulled out of the 2016 U.S. presidential race on Monday, doomed by a lightning-quick collapse from serious contender to a candidate struggling to raise money and his profile.
Walker, reading a statement in the Wisconsin capital of Madison, decried the negative tone of the Republican campaign in remarks seemingly directed at New York billionaire Donald Trump.
He called on some of his rivals for the Republican nomination to join him in exiting the race to give voters a chance to rally around a front-runner that can win the November 2016 presidential election.
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