chris cillizza has a piece about that on cnn.com. so walk us through how real this morning is that threat for mitch mcconnell, chris? >> sure, erica. let's start with what we definitely know. point one, donald trump does not like mitch mcconnell. he has gone after him many times. point two, donald trump has tried to recruit someone within the senate to challenge mitch mcconnell for that leadership role and so far has been unsuccessful. what is he doing now? well, kelly shibaka, the republican running against lisa murkowski from alaska, came out on monday and said, if i'm elected, i will not vote for mitch mcconnell to be the next leader. she's not the first republican candidate to say that. missouri's former senator said he, too, would not vote for mcconnell if he wins. why does this matter? well, there is an obvious rival to mitch mcconnell right now. that's why mitch mcconnell is mitch mcconnell. he's done a really good job of beating back any potential people who are going to beat him in a leadership race. but what is worrisome for