Presidential campaigns gear up for post-election legal battles

A U.S. district court judge has ordered the United States Postal Service to speed up the delivery of ballots in Detroit. It's just one of the many election-related lawsuits filed this year, as 2020 shapes up to be one of the most litigated election years ever. Richard Briffault, a professor of legislation at Columbia Law School, joined CBSN's Lana Zak to discuss.