this is sound from former pennsylvania governor rendell certainly a hillary clinton supporter about what biden would have to do to make inroads with clinton. let's listen. >> he could make up ground on hillary and you saw the polls. the only way he makes up ground to attack her personally. they're very good friends. they have been for a long while. they worked together in the senate and the white house. i don't know if joe biden has the stomach to launch a campaign based on attacking hillary clinton. >> truth to that? >> he is a governor rendell, one of the strongest clinton supporters that there is. he's been very loyal to clintons and i respect that but the reality joe biden is most popular democratic official in the poll and not even being in the race. so again i think he can stand on his own two feet. what we saw in the des moines poll is a wide-open primary and getting in it will be interesting. >> many looking for the clues of if he'll jump in, fund raidsing, staffing up.