much for being here. it's really nice to see you back. >> great to be with you, rachel. >> so you have been remarkably consistent in your policy positions over the years. also your style. you have, as far as i can tell, in 35 years in public office you have never run a negative ad against an opponent. i can find no instances of you even saying anything particularly nasty or even sharp-tongued about an opponent. but you are drawing a sharp contrast here. >> i am. and the reason that i am is i think it's important for voters in the democratic primary process to understand one very important fact. yes, it is a good idea that recently, for example, hillary clinton has decided to oppose the tpp, transpacific partnership. that's great. i'm glad she did that. well, i have been opposed to these disastrous trade agreements from day one. i'm glad that hillary clinton has come on board and now said, well, she's against the keystone pipeline. well, you know what? if you take climate change seriously and you understand the