Presidential candidate Hillary Rodham Clinton sought on Thursday to force another showdown with President George W. Bush - and her Democratic rivals - over the Iraq war. Sens. Clinton Robert Byrd, both Democrats, announced they would introduce legislation that would require the president to seek a reauthorization from Congress to extend the military effort in Iraq beyond Oct. 11, 2007. "If the president will not bring himself to accept reality, it is time for Congress to bring reality to him," Clinton said in a speech on the Senate floor. The two senators have not decided how they will seek to force a vote on the measure, whether through an amendment, a stand-alone bill or a spending bill.