Trump signs GOP loyalty pledge

Republican presidential candidate Donald Trump announced Thursday that he has signed a pledge not to run as an independent in 2016.

He made the announcement after a meeting with Republican National Committee Chairman Reince Priebus.

Trump, the GOP presidential frontrunner, was the only one who did not raise his hand when the 10 top-polling candidates were asked at last month's Fox News debate whether they'd commit not to mount an outside White House bid.

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