john edwards came in second and dean slipped to third. then he delivered his disastrous "i have a scream" speech. >> and oregon and washington and michigan! and then we are going to washington, d.c. to take back the white house [yelling]. >> iowa is completely full of stories like that. every cycle i have ever been nsomething unexpected happens. >> kerry cruise to the nomination and picked edwards as his runningmate and lost. but if any year confirmed the impact that iowa has on the presidential nomination process, it was 2008. on the democratic side, john edwards campaigned almost exclusively in iowa. hoping a win would propel him past the hillary clinton juggernaut. enter the junior senator from illinois, barack obama. a community organizer, with a great ground game and growing celebrity support. >> thank you, iowa. >> obama won the caucuses with almost 38% of the vote, while clinton finished third, edged out by edwards. suddenly, the entire race was changed. >> it isn't too much to say that vaulted him into the office? >> certainly the
