When bad things happen, it’s always nice to have a scapegoat. So, with Americans furious about soaring oil prices, Congress has gone in search of someone to blame. There are a number of usual suspects to choose from, depending on your politics—OPEC, greedy oil companies, lily-livered environmentalists opposed to oil drilling—but now Congress has seized on another set of villains: commodity speculators. “Excessive market speculation,” in the words of Senator Joseph Lieberman, has supposedly inflated the price of oil and other commodities beyond reason. Curb speculation, as a raft of proposed laws intend to do, and oil prices will soon return to earth.