Republicans and Democrats are ramping up accusatory tweets, floor speech insults, and hallway criticisms of each other as the Senate hurdles toward what the GOP hopes is a final vote this week on Supreme Court nominee Brett Kavanaugh.... ...Late Tuesday, Senate Judiciary Committee Chairman Chuck Grassley, R-Iowa, got fed up with it after Sen. Chris Coons, D-Del., sent along a letter that included a vague allegation..."My investigators have serious work to do," he wrote to Coons. "I therefore hope that, before forwarding an allegation in the future, you will first consider whether you'd want you or your staff to spend...