WASHINGTON, April 17 -- Rep. Henry C. 'Hank' Johnson Jr., D-Georgia, issued the following news release and letter: Senator Sheldon Whitehouse (D-RI) and Representative Hank Johnson (D-GA), today sent a letter calling on the Judicial Conference to refer Supreme Court Justice Clarence Thomas to the U.S. Attorney General for potential violations of the Ethics in Government Act 1978. The members sent this letter one day after a second ProPublica report exposed that Justice Thomas failed to disclose more PR