The National Rifle Association, which did not endorse President Bush in 2000 and 2004 until just a month before the general election, is considering stepping into the presidential campaign fray early next year during the primary season, the group's chief lobbyist says. While the NRA waited until October in each of the past two presidential election years before endorsing a candidate, the group plans to take a more high-profile role early in the 2008 Republican nomination process. "Historically, we have not gotten involved in primaries. We traditionally wait until after the conventions," said Chris Cox, head lobbyist for the NRA....