Lawrence: Obama & other Dems make Trump's stupidity an issue in the campaign

Tonight on The Last Word: Former President Obama stumps in Georgia for Sen. Jon Ossoff and Keisha Lance Bottoms. Also, Donald Trump is back in Ohio again as Republicans try to hold the Senate. And a former Republican governor backs Dr. Annie Andrews for the South Carolina Senate race. Sen. Jon Ossoff, Sherrod Brown, Ali Velshi, and Dr. Annie Andrews join Lawrence O’Donnell.