Tonight on The Last Word: A father of three Marines is beaten and arrested by masked federal agents in California. Also, Democrats demand answers on delayed Iran briefings. Plus, GOP senators are split over Medicaid cuts in the budget bill. And Donald Trump is expected to meet Volodymyr Zelenskyy during the NATO summit. Sen. Adam Schiff, Sen. Amy Klobuchar, and Amb. Michael McFaul join Lawrence O’Donnell.