WASHINGTON — Since U.S. forces attacked in 2003, Rep. Christopher Shays, a moderate Republican from Connecticut's liberal 4th District, has been a stalwart defender of the Iraq war. "I've been carrying the bucket when it comes to the war," Shays said in September. But facing an antiwar Democratic opponent in a tough midterm election race, Shays is starting to express reservations. In a telephone interview Friday after he returned from his 14th trip to Iraq, Shays said that he believed the U.S. should consider setting a timetable for the withdrawal of its troops, and that he planned to hold congressional...