Stop here if you want to pick up a baseball cap with commander in chief printed across its bill, a T-shirt proclaiming i love my country, it’s the government i’m afraid of, White House guest towels, Obama coasters, or other impress-the-folks-back-home items. Or save your shopping for the airport; America! has at least 3 locations at National, 2 at BWI, and 6 at Dulles.