Quote (thundercock @ Aug 25 2020 04:37pm)
Probably b/c the concept of a "battleground" changes each election. I'm not too sure. Either way, you could look at the polling data of each state.
I don't think the aforementioned diagram really does much outside of highlighting that this election is different. Clinton had some really interesting polling swings whereas Biden has been remarkably consistent.
https://www.realclearpolitics.com/epolls/2020/president/us/trump-vs-biden-top-battleground-states-2020-vs-2016/Top Battlegrounds (2020 vs. 2016): Pennsylvania, Michigan, Wisconsin, Florida, North Carolina, Arizona
I think it's an interesting narrative to watch. The concern from Biden's perspective is whether or not he's picking up support inordinately in areas where he's already guaranteed to win. If Trump does win, it's almost certain that he will lose the popular vote, and probably by a much wider margin than last time around.