WASHINGTON -- Senator John F. Kerry is placing himself at the center of congressional action over the war in Iraq this week with a crisply worded resolution to require President Bush to withdraw almost all US troops by the end of this year. The measure has exposed Kerry to attacks from Republicans and some Democrats, as critics rushed to tag the plan as a ``cut-and-run" strategy. But it also has made him a rallying point for antiwar activists. The sweeping resolution amounts to the senator's sharpest condemnation of the war and his broadest repudiation of his own vote to authorize...