Rush Limbaugh's "Operation Chaos," the effort to urge conservatives and Republicans to vote for Hillary Clinton in order to prolong the Democratic nomination battle, certainly annoys MSNBC's Chris Matthews who, during primary coverage Tuesday night, denounced the "mischief-making" by "a talk jock." In the 11:30 PM EDT half hour, Matthews offered a "Keith [Olbermann]-style special comment" about how "anyone who voted to screw up the political system of this country with the purpose of mischief should carry that with them the rest their lives." He called it "a ridiculous way to use the vote for which people fought and died,"...