Tonight on the Last Word: U.S. officials tell Sen. Bernie Sanders that Russia is attempting to help his presidential campaign. Also, Rep. Eric Swalwell talks to Lawrence about why Trump supporters refuse to believe Russia meddled in the 2016 election. Plus, Mike Bloomberg offers to release three women from non-disclosure agreements. And presidential candidate Fmr. Gov. Bill Weld reacts to Intelligence officials telling Congress that Russia is working to re-elect Trump. Joyce Vance, Mieke Eoyang, Rick Stengel, Stephanie Valencia and Ruth Marcus also join Lawrence O’Donnell.