WASHINGTON, Dec. 22 -- Sen. Elizabeth Warren, D-Mass., has introduced legislation (S. 5070) to "improve the anti-corruption and public integrity laws." The bill was introduced on Dec. 20. It was referred to the Senate Finance Committee. For more information, Sen. Elizabeth Warren, 309 Hart Senate Office Building, Washington DC, 20510; 202/224-4543; or in state at 2400 President John F. Kennedy Federal Bldg., 15 New Sudbury St., Boston, MA 02203; 617/565-3170; 1550 Main St., Ste. 406, Springfie  more