Obama Triumphs in Iowa Contest as Clinton Falters; Huckabee Rolls

Mr. Obama’s victory amounted to a significant setback for Senator Hillary Rodham Clinton of New York, who just months ago appeared to be the front-runner for the Democratic presidential nomination, but has watched her position erode over the past several months. The result also left uncertain the prospects for John Edwards, a former senator from North Carolina, who had staked his second bid for the White House on winning this state.