During a House subcommittee hearing last week, former Vice President Al Gore was questioned about his ties to a company that stands to profit from proposed cap-and-trade legislation now pending before the committee. Mr. Gore testified in favor of this legislation. U.S. Rep. Marsha Blackburn, R-Tenn., wanted to know if he is profiteering. During the April 24 House Subcommittee on Energy and Environment hearing titled “The American Clean Energy and Security Act of 2009,” Ms. Blackburn asked Mr. Gore about a potential conflict of interest he might have. She cited an Oct. 8, 2008 New York Times story that mentions...