Ian M. MacIsaac: An Obituary for Santorum and his doomed hell train of a campaign

  On Tuesday, Mitt Romney finally earned a title he has craved since he became the governor of Massachusetts nine years ago: that of the Republican Party's presumptive nominee for president.

  Rick Santorum's effective withdrawal from the primary brings to an end one of the most confusing, frustrating, and truly embarrassing moments in our nation's political history.

  Santorum, for his part, barely even admitted he had lost anything in the concession speech he gave from Gettysburg, Penn.

  "Over and over again we were told, 'Forget it, you can't win,'" the former senator said Tuesday as he quit the race from his home state. "We were winning, but in a different way."