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 least for more than a half century. john f. kennedy was the last democrat to win the white house without winning ohio. but some democrats after hillary clinton's defeat in 2016 are wondering if this state is still winnable. the answer may lie in the suburbs right here around westerville. >> thank you, ohio. we love you, ohio. >> and ohio loved president trump back. his 2016 victory is so convincing it begs the question of whether ohio has lost its lore as a pivotal battleground. this week as democratic presidential candidates descend on the state for their next d