On Friday's PBS NewsHour, liberal commentator Mark Shields made a very odd historical comparison -- the 2020 Democrat presidential contenders were like American revolutionaries of 1776, fighting a president who is somehow like King George III, the tyrannical English monarch. But first, both Shields and David Brooks agreed that Bernie Sanders -- the antithesis of 1776 libertarian ideas -- was the clear front-runner among Democrats, and Michael Bloomberg had a terrible debate. "He couldn't go toe to toe with Elizabeth Warren. I mean, she absolutely dominated him. She dominated the stage," proclaimed Shields. "I'm not sure she won the crowd,...