With opinion polls showing him falling further back against Democrat Hillary Clinton, Donald Trump has intensified his allegations about a "rigged election."
U.S. 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."
Also read: First Read's Morning Clips: Tweeter-in-Chief
14:55 The most likely explanation for Donald Trump’s fraud claims is the simplest one: Ego13
03:27 The Latest: Trump slams CNN over baseless voter fraud claim18
05:16 Alec Baldwin's Trump Can't Stop Tweeting During National Security Briefing on 'SNL'7
15:03 Raw emotions persist as Donald Trump prepares for his presidency9