Lawrence: Republicans boycott Trump’s pretend convention as Democratic campaigns find new strength

Tonight on The Last Word: Mary Peltola leads incumbent GOP Sullivan in key Alaska Senate race. Plus, Trump looks to make midterms a referendum on his presidency. And Trump gave White House aides $45,000 cash gifts.  Mary Peltola, Rep. Chris Pappas, Sen. Mark Kelly, and Andrew Weissman join Lawrence O'Donnell.