'Dump Trump' campaign underway

Move can create turmoil at event used to bring party together in support of the candidate

The "dump Trump" movement is gaining followers among delegates to next month's Republican National Convention, an effort that could tarnish Donald Trump's coronation even if it ultimately fails.

Several hundred Republican delegates are organizing to oppose Trump at the convention. That's not enough delegates to topple Trump. But it's more than enough to create turmoil at an event that is typically used to bring a political party together in support of a presidential candidate.