Questions about mail-in ballots, postmarks and vote counting

Many voters are concerned about their mail-in ballots potentially not being counted due to postmark issues that are out of their control. Myrna Perez, director of the Brennan Center for Justice's Voting Rights and Elections Program, joined CBSN AM to explain why voters should feel confident their vote will be counted and how many states have accounted for issues with postmarked ballots.