Tracy Republican Richard Pombo said today he will seek the congressional seat of George Radanovich, who announced last week that he would not seek re-election. Pombo said he will make an official announcement Tuesday afternoon on KMJ radio in Fresno. The decision by Pombo is a potential game-changer, political analysts said. State Sen. Jeff Denham of Atwater and former Fresno Mayor Jim Patterson already have announced their intentions to replace Radanovich, but Pombo has Washington experience and the backing of some influential San Joaquin Valley agricultural interests. Pombo served seven terms in the 11th Congressional District before being ousted in...