about this strategy to help the sanders campaign? >> reporter: fredricka, sorry, a little loud here at drake university where senator sanders and representative alexandria ocasio-cortez are set to hold a climate summit talking about these specific issues that the two of them are aligned with and what they can hope can drum up support for him here in iowa. they had a huge rally in council bluffs on the western side of iowa. alexandria ocasio-cortez telling the crowd this was her first trip ever to iowa and she wanted to come to support bernie sanders in his campaign because she was inspired by his political movement four years ago when he ran for president, and she wants to see him get elected this time around. what's interesting about alexandria ocasio-cortez as a political figure is that she's a superstar. she is a celebrity. she draws out a big crowd in a way that few other politicians can, so the sanders campaign doesn't necessarily see her as expanding their base of support. in other words, bringing people into the fold that weren't already there. but instead they view her as