Candidates begin filing papers to run in 2004 primary election AUSTIN (AP) — Candidates for president, Congress, the Texas Legislature and other offices began filing papers for the 2004 primary election Wednesday, even as a dispute simmered over which congressional districts will be used. Democratic U.S. Rep. Martin Frost of Arlington filed to run in the district he has represented for 25 years. Frost said he was confident a federal court will uphold existing congressional boundaries and toss out a GOP redistricting plan approved this fall. The Republican map, which Democrats claim violates minority voting rights, decimated Frost's heavily minority...