WASHINGTON -- As Democratic leaders try to end the continuing fight for their party's 2008 presidential nomination, the contest between Barack Obama and Hillary Clinton heads into an unusual phase: of the final seven states to vote, only one, Oregon, has supported a Democratic nominee in the last two White House contests. The fate of Obama and Clinton could rest in the hands of voters in states that could have little impact on the outcome of the general election this fall, beginning May 6 with two reliably Republican states, Indiana and North Carolina, and ending June 3 with even more...