middle-of-the-road voters who are disappointed in president obama but still haven't committed to romney. president obama and clinton have had a rocky history. they clashed during the 2008 democratic primary race. but with the president's popularity ratings the lowest preconvention for any incumbent since the 1980s, the obama campaign knows the big impact that clinton could have. >> bill clinton loves to be needed as much as he needs to be loved. he is really needed by barack obama right now. >> reporter: president obama will make his sales pitch to voters right here in this arena. that was not the original plan of course, rob and paula, he was supposed to do it outside. but because of weather concerns, democrats decided to move it inside this arena. they say they will not let that rain on their parade. >> a lot of folks thought they were going to hear the president that won't be allowed in because it doesn't seat as many people. did bill, the big dog do his job in his speech last night, karen? >> wow, rob, paula. he had people hooting, hollering here. everybody was on their feet. he really got the crowd revved up. this was also a well-crafted speech. he used humor. he used a couple anecdotes.