Sign up for the Surge, the newsletter that covers most important political nonsense of the week, delivered to your inbox every Saturday. Welcome to this week’s edition of the Surge, a newsletter that thought it was closely guarding its proprietary news-ranking formula only to discover that the U.S. trade representative just used the same exact one to destroy the global economy. You don’t need us to tell you: We are in deep, folks. There is an internet dingbat leading purges on the National Security Council. There is a man talking on the Senate floor for 25 hours straight. There is…