you and senator sanders agree a lot when it comes to policy. you clearly have mutual respect between you two as individuals, there's a lot of overlap in your supporters and admirers. you're both so popular right now in this primary that it's possible that you two may split the progressive vote down the middle, thus resulting in a more centrist candidate winning the nomination instead of either of you. how do you and senator sanders avoid that fate? >> look, i've been friends with bernie what feels like forever and forever, certainly long, long before i ever got into politics at all. the first town hall i ever did was for bernie up in vermont when i was still teaching. but i see this as where we are right now is we're just out there, everybody is, making your case for your vision of what it would mean to have -- for you to be in the white house, what your case is for the argument for what we need to do as a country. and i think that's a good and healthy thing to happen, to get a lot of people into this