Changes on House Commerce Committee majority staff: Todd Harrison,...

Changes on House Commerce Committee majority staff: Todd Harrison, chief counsel for Oversight and Investigations Subcommittee, leaving to return to private practice in New York; Karen Christian promoted to replace him; Michael Gruber, senior policy adviser to committee, going to private sector … Hogan Lovells hires Trey Hanbury, ex-Sprint Nextel, as partner, technology, media and telecoms practice … hires Frank Bell, ex-PR Wireless, as president, global sales and marketing, effective Oct. 1 … Andreessen Horowitz hires Adrian Fenty, ex-Washington mayor, as special adviser … Lobbyist registrations: NCTA, Bates Capitol Group, effective Sept. 1.