Key paragraph:

Longer term, these numbers suggest turmoil in the partisan alignment. Those who prefer a more traditional Republican may be searching for a new political home since their party is now more supportive of a populist approach. On the Democratic side, there is a much talked about inter-party divide ready to boil over. On that side of the aisle, the traditional and populist wings are evenly matched

Also behooves to think about what this kind of stat means in all downticket races, including the all important Senate.

And should be noted this is THE Biden bi-partisan thing, they are happy with bipartisan and moderate talk in general (though of course on specific individual policy issues, the mileage may vary. I.E. some care more about gun rights, global warming, federal deficits, taxation levels, culture wars like abortion etc., and will veer right or left on those particular things.) Just don't throw populist righteous anger at them (yes I am thinking of Bernie bro types who think fighting fire with fire is great fun and sport! As do Trumpies.)