Tamara Keith and Amy Walter on Biden’s DNC, Trump vs. USPS

NPR’s Tamara Keith and Amy Walter of the Cook Political Report join Judy Woodruff to discuss the latest political news, including the opening night of the Democratic National Convention, President Trump’s counter-programming during a big week for former Vice President Joe Biden, Trump’s efforts to undermine the U.S. Postal Service and how Congress might intervene in response.