Democrats criticized the postmaster general for overseeing recent operational changes that led to delays in mail delivery. Source

Postmaster General Louis DeJoy returned to Capitol Hill on Monday to testify before the House Oversight Committee. DeJoy continued to defend changes made to the Postal Service ahead of the 2020 election while also fielding questions regarding his loyalty to President Trump. CBS News chief congressional correspondent Nancy Cordes joins CBSN’s Elaine Quijano to discuss. Source

2020 Republican National Convention kicks off; GOP’s fight to win North Carolina in November Source

Drugmaker AstraZeneca’s vaccine is now in advanced trials and the company says it has the capacity to make 3 billion doses when the vaccine is ready. Charlie D’Agata has the latest in CBS News’ series “Racing to a Cure.” Source

The Republican National Convention is beginning on Monday and President Trump appears in full control of the message. CBS News’ Major Garrett and CBSN political reporter Caitlin Huey-Burns join CBSN’s “Red & Blue” with a look at what to expect this week. Source

Firefighters continue battling several wildfires up and down California that have claimed the lives of at least seven people. Source

Four years ago, the L.A. City Council designated August 24 as Kobe Bryant Day, but this year’s celebration is much more poignant after his sudden loss. Jamie Yuccas reports. Source

Scientists in Hong Kong say they’ve confirmed the world’s first-known coronavirus reinfection in an “apparently young and healthy patient” who tested positive for the virus about five months after the first infection. Manuel Bojorquez has the latest. Source

At least 17 major wildfires are burning across California, including two of the largest in the state’s history. Jonathan Vigliotti reports. Source

Here’s a look at the top stories making headlines on the “CBS Evening News with Norah O’Donnell.” Source