Guests: Sherrilyn Ifill, Quentin Fulks, Basil Smikle, Tim Miller, Marc Elias

The Trump campaign lashes out at the U.S. Army—and the Republican nominee says the cemetery set him up. Tonight: how the "altercation” at Arlington fits into the dark turn by the Trump campaign. Then, the Harris campaign returns to the stump with a new bipartisan promise. Plus, what we know about how Kamala Harris is preparing to debate Trump. And the new hire from the Harris team to stop election subversion before it starts. 

Want more of Chris? Download and subscribe to his podcast, “Why Is This Happening? The Chris Hayes podcast” wherever you get your podcasts.