Political satires are a tough sell on the big screen. Films such as 'Wag the Dog' and 'Primary Colors' never came close to the genius that fueled Stanley Kubrick's 'Dr. Strangelove' in 1964. But writer/director Armando Iannucci's first feature film, 'In the Loop,' is on the right track because it watches Washington spin and sell the insanities of war.