Letter to the Honorable John Thune, Chairman on Commerce, Science, and Transportation; The Honorable Bill Nelson, Ranking Member of the Committee on Commerce, Science, and Transportation; the Honorable Roger Wicker, Chairman of the Subcommittee on Communications, Technology, Innovation, and the Internet; the Honorable Brian Schatz, Ranking Member of the Subcommittee on Communications, Technology, Innovation and the Internet - Call for Hearing on Video and Media Marketplace in the Wake of Proposed AT&T - Time Warner Deal