US election: Barack Obama wobbles on withdrawing Iraq troops By Tim Shipman in Washington Last Updated: 12:20AM BST 04/07/2008 Senator Barack Obama has rushed to clarify his position on the Iraq War after he appeared to wobble on a commitment to withdraw US ground troops within 16 months, a central plank of his candidacy. Barack Obama speaks on his Iraq policy during a news conference in Fargo, North Dakota The Democratic presidential nominee used a press conference to say that the timetable was not set in stone and that he would adjust his plans based on conditions on the ground...