electability question, i've got to say, cornell's point of barack obama was way behind hillary clinton in 2008. he changed that balance. and did he do it primarily through debate performance? what changed in voters' minds about barack obama's electability? >> iowa. the reality is that cornell's right. the democratic party. >> didn't he have to convince those iowa vote ares. >> he did. >> that he could beat the republican in the general election in order to get their votes in the first place which then had an effect on other vote. >> the iowa electorate, it's reprogressive, liberal. they need passion. democrats tend to be passion voters. barack obama went in there and in iowa you go door to door. you convinced them with reta politics had he something to offer that was new. that was a change election. idea was, you had this sort of era of bush economic collapse. and the idea was who can change