from donors who don't understand why they're not hearing anything about their candidates, and so i think there are questions about whether hunter biden is serious enough baggage on joe biden's candidacy that it would hinder him as a general election candidate. are his rivals going to feel that they should go full-bore after that or that that is taking the heat off of president trump and that it's more important to keep the focus on the president. and i think we'll see it's going to be a big element in tonight's debate. >> margaret, david, thank you very much for helping us preview that as well as all of the impeachment news. thank you. just hours from now 12 democratic presidential candidates will hit the debate stage right here on cnn. after losing ohio in 2016, can democrats flip that state back to blue in 2020? cnn's jeff zeleny is live in the debate hall in westerville, ohio, what's the answer, jeff? >> reporter: ohio has been the mother of all battlegrounds, at