Trump's False Claim About Poll Watchers Renews Fears Of Voter Intimidation

In this week's first presidential debate, President Trump encouraged his supporters to monitor the polls after falsely implying that the integrity of elections was compromised because GOP poll watchers were turned away from locations in Philadelphia.

Myrna Perez, director of the Brennan Center's Voting Rights and Elections Program, explains what poll watchers do and the legality of their duties.