What Went Down In The Fourth Democratic Debate

Agreed, and notable that the moderators asked Warren first rather than Biden, right?

The first question is a softball chance for the co-front-runner (Warren, the new hottest ticket in the polls) to give the Democratic line on impeachment.

No, Anderson Cooper, Ohio is probably not one of the most critical battleground states, even though some recent polls there show Trump doing worse there than you might expect. Still, if Democrats were to win Ohio, they probably would have won a whole bunch of easier states (e.g. Michigan, Pennsylvania) first, and therefore the presidency.