By Spencer Ackerman May 25, 2011 You may think you understand how the Patriot Act allows the government to spy on its citizens. Sen. Ron Wyden (D-Oregon) says it’s worse than you’ve heard.

Congress is set to reauthorize three controversial provisions of the surveillance law as early as Thursday. But Wyden says that what Congress will renew is a mere fig leaf for a far broader legal interpretation of the Patriot Act that the government keeps to itself — entirely in secret. Worse, there are hints that the government uses this secret interpretation to gather what one Patriot-watcher calls a “dragnetâ€