Republican U.S. Sen. Bob Corker of Tennessee made profitable short-term trades in a Chattanooga real estate firm, but didn't properly disclose the deals until challenged by the Wall Street Journal. The newspaper reports Corker, a former Chattanooga mayor who is now chairman of the Senate Foreign Relations Committee, bought between $1 million and $5 million in shares of CBL & Associates Properties Inc. 2011, and sold them again five months later at a 42 percent gain.