WASHINGTON, May 30 [Category: ThinkTank] -- The Competitive Enterprise Institute issued the following news release: The Competitive Enterprise Institute today led a coalition letter to Congress in support of an effort to undo the EPA's power plant rule, which was published this month and set to go into effect in July. The letter, signed by over 40 free-market-oriented and conservative organizations, argues that the rule will undermine energy affordability and reliability and that the EPA lacks   more