By David Shepardson WASHINGTON (Reuters) – A bipartisan group of lawmakers on Monday introduced legislation to strengthen the authority of the Federal Communications Commission to oversee foreign sponsorships of U.S. broadcast TV and radio programs. Democratic Senator Brian Schatz, Republican Senator Marsha Blackburn and Representative Anna Eshoo, a Democrat, proposed giving the FCC authority to compel broadcasters to check foreign media databases to better identify groups sponsoring programming. “Foreign governments shouldn’t be able to hide behind shell companies to fund misinformation and p…