Why Trump's 'Ballot Watchers' Might Be Illegal

Donald Trump's repeated calls for supporters to gather friends and family to monitor polling places for cases of voter fraud raises a thorny question: When, exactly, do "ballot security" measures cross the line into illegal acts of voter intimidation?

"You’ve got to go out. You’ve got to go out. And you’ve got to get your friends. And you’ve got to get everyone you know.