"The Kansas two-step" is what a practice by state troopers in Kansas of stopping cars with out-of-state license plates ruled unconstitutional by a federal judge. The New York Times reports: Kansas Troopers 'Waged War on Motorists,' Federal Judge Finds. The following sums up the Court's ruling:
“The war is basically a question of numbers: stop enough cars and you’re bound to discover drugs,” wrote Senior Judge Kathryn H. Vratil of the Federal District Court. “And what’s the harm if a few constitutional rights are trampled along the way?”
Always nice, especially given its rarity, to see a federal judge sticking up for the rights of ordinary citizens. The Fourth Amendment to our Constitutional prohibits unreasonable searches and seizures of our persons and things.