House ratings changes: A dozen races shift toward Democrats

I can't speak to the whole country - all politics are local, as they say - but I can speak on Minnesota.
These ratings seem to have some pretty hard liberal bias and MN contains hints as to why.
MN-1 is a deeply red district and has been that way for decades. Back in the 80's it was much more competitive as it encompassed Rochester on the east metro area. But since then it is staunchly conservative.
MN-2 is a historically red suburban district that went blue for the first time last cycle. It still leans to the GOP, but not as much as MN-1. That is definitely a vulnerable seat. At this point, I'd call it a toss-up. Rep Craig will most likely get a rematch with former Rep Jason Lewis, and Lewis was pretty popular and a local radio personality.
MN-7 is also a deeply red district, but they love Rep Colin Petersen out there. Why the website downgraded Petersen's chances is because of his vote against impeachment, point-blank. I can tell you that farmers out there love his position on the agriculture committee and the subsidies for ethanol in particular that helps bring. It would take a heck of a challenger to unseat him.

Just saying about that...

It’s way too early. I wish we were like other countries that limit election seasons to just a couple months before the actual election.