is the republican party. this is a matter of make iing things work. >> as the talk of iran heats up, the polls show registered democrats cooling on the idea of a joe biden campaign. also these numbers for you, this "wall street journal" poll found 38% of democratic primary voters don't think biden should run compared to the 30% who do. our correspondent jeff zeleny, who has had much of our inside scoop here on a possible biden run is with us now. as far as strategy, jeff, especially with the whole veiled swipe on the enemies and republicans bit, what do you think his strategy is here? >> it's clear that the vice president was sitting home that night watching that debate on cnn. it's clear he's been really reciting lines back and that enemies line is so interesting. he's trying to draw a distinction in how he would run