Iowa voting first winners, losers in 2008 presidential campaign

Arizona Sen. John McCain, Rep. Ron Paul of Texas and former Tennessee Sen. Fred Thompson were also on the ballot, although their aides made no claim they were in the running for a first-place finish. So, too, Rudy Giuliani, the former New York mayor who largely abandoned the state in the campaign's final days.

Iowa sends 45 delegates to the Democratic National Convention next summer in Denver and 37 to the GOP gathering in St. Paul, Minn. But that was hardly the reason the crowded field of presidential hopefuls devoted weeks of campaigning, built muscular campaign organizations and spent millions of dollars on television advertising in the state.

For three decades, Iowa's caucuses have drawn presidential hopefuls eager to make a strong first impression, and this year was no different.

Obama, Clinton and Edwards spent at least $19 million on television advertising among them, and all three capped their campaigns with statewide broadcasts on Wednesday. Romney told supporters in a final daylong swing around the state he had been in 68 of 99 counties since he began his quest for the White House, had spent 55 days in Iowa and spoken before 248 separate audiences.