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President Obama has taken a lot of heat from Republicans in recent weeks over high gas prices, and what he coulda, shoulda done to keep them lower. The debate reached a fever pitch during the rejection of the Keystone pipeline, and it will be a constant political refrain as long as gas remains close to $4 a barrel. It’s no wonder that the President is now trying to turn the tables by going after commodities speculators, whom he blames for distorting markets, with tougher regulation.