Dana Milbank: Rest in peace, Lindsey Graham

Washington - We lost two mavericks within a week.Last Saturday, we lost the legendary John McCain.On Tuesday, we lost his loyal sidekick, Sen. Lindsey O. Graham.Graham remains alive and well, but after serving for two decades as Robin to McCain's Batman, Graham buried whatever remained of his own reputation for iconoclasm even before his partner's funeral.On Tuesday, the South Carolina Republican took a seat on the couch of "Fox & Friends," President Trump's favorite show, and sealed his tra