President Barack Obama lacerated Donald Trump on Tuesday over his repeated assertions that the Nov. 8 election is rigged against him, telling the Republican presidential candidate to "stop whining and go try to make his case to get votes."
With opinion polls showing him falling further back against his White House rival, Democrat Hillary Clinton, Trump has intensified his allegations, although numerous studies have shown that voter fraud in U.S. elections is rare.
At a campaign rally in Grand Junction, Colorado, Trump continued his attack, saying, "The press has created a rigged system and poisoned the minds of the voters."
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