Senator John F. Kerry may have won the contest for the Democratic presidential nomination, but he still faces a fight for the hearts and minds of the party's antiwar wing. With violence surging in Iraq, voters who want a quick end to the US-led occupation are shaping up as a potentially critical constituency, and Independent presidential candidate Ralph Nader is making a direct pitch for their support in November. Meanwhile, Representative Dennis J. Kucinich of Ohio, a vocal war critic, continues to campaign in the hope of exerting influence at the Democratic convention in July. Leaders of progressive groups who...