WASHINGTON - A rebellious Senate committee defied President Bush on Thursday and approved terror-detainee legislation he has vowed to block, deepening Republican conflict over a key issue in the middle of congressional campaigns. Sen. John Warner (news, bio, voting record), R-Va., chairman of the Armed Services Committee, pushed the measure through his panel by a 15-9 vote, with Warner and two other GOP lawmakers joining Democrats. The tally set the stage for a showdown on the Senate floor as early as next week.