At the end of 2007, opinion polls showed a close 3-way race in the Iowa Caucuses among Senator Hillary Rodham Clinton, former Senator (and 2004 Vice-Presidential candidate) John Edwards, and Senator Barack Obama. The final result--Obama 38%, Edwards 30%, Clinton 29%--was a major boost to the candidacy of Obama, who had been trailing Clinton by double-digits in the national opinion polls for all of 2007. What if Edwards had won the Iowa Caucuses--Edwards 38%, Obama 30%, Clinton 29% ?