WASHINGTON - It was billed as a conversation with U.S. troops, but the questions President Bush asked on a teleconference call Thursday were choreographed to match his goals for the war in Iraq and Saturday's vote on a new Iraqi constitution. ADVERTISEMENT click here "This is an important time," Allison Barber, deputy assistant defense secretary, said, coaching the soldiers before Bush arrived. "The president is looking forward to having just a conversation with you." Barber said the president was interested in three topics: the overall security situation in Iraq, security preparations for the weekend vote and efforts to train Iraqi...