Donald Trump Divides the Republican Party

Surrogates for Donald Trump claim he's no racist, but his attack on a federal judge with Mexican ancestors was the last straw for many Republicans. Some GOP Senators are refusing to back him, and one is calling for the convention in Cleveland to choose somebody else. Other party leaders are gritting their teeth and supporting the presumptive nominee, even House Speaker Paul Ryan, who called Trump's attack "racist." We hear more about the case against Trump — and the case for Party unity.