Lawrence: GOP attacks on truth gave us would-be Pelosi assassin

Tonight on The Last Word: The accused Pelosi attacker is facing federal and state charges. Also, Democrats send former President Barack Obama to stump in battleground states. Plus, The Washington Post reports that a top Justice Department national security prosecutor is joining the Mar-a-Lago document investigation. And a new biography explores Abraham Lincoln’s views on democracy. Claire McCaskill, Andrew Weissmann, Eddie Glaude, Michigan Attorney General Dana Nessel and Jon Meacham join Lawrence O’Donnell.