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Donald Trump attacks ‘voter-nullification scheme’

The Republican front-runner has penned a scathing op-ed, writing that a "planned" vote in Colorado was "canceled," causing GOP voters to be "sidelined."

Republican presidential candidate Donald Trump holds a news conference at his hotel, which is under construction, in Washington D.C. on March 21, 2016. (Photo by Mark Peterson/Redux for MSNBC)
Republican presidential candidate Donald Trump holds a news conference at his hotel, which is under construction, in Washington D.C. on March 21, 2016.mark peterson/redux pictures 2016

Leigh Ann Caldwell