NRA endorsement of Bush is on holdGun-rights group watches, waits on weapons banBy Bob Cusack An influential gun-rights group known for backing Republicans is unlikely to endorse President Bush until after the federal assault-weapons ban expires in September. Bush supports the renewal of the 10-year ban but has not called on the GOP-controlled Congress to act. If he does so, the move would probably cost him the endorsement of the National Rifle Association (NRA). Some political observers believe that the NRA's endorsement is a certainty, pointing out the group's stinging criticism of Sen. John Kerry (D-Mass.), the presumptive Democratic presidential...