What we know about sexual assault allegation against Biden

A woman has come forward alleging that former Vice President Joe Biden sexually assaulted her in 1993, when she was an employee in his Senate office. Biden, poised to become the 2020 Democratic presidential nominee, has faced criticism in the past over unwanted touching of women. Amna Nawaz talks to The New York Times’ Lisa Lerer for details of the story and what it means for Biden’s candidacy.