That article seems to indicate that neither party really has a good idea what's going on in the Senate. I have to wonder in what universe Nevada and Arizona are "tilted toward the Republicans", Florida is leaning toward the Republicans, Missouri is locked up for the Republicans, but Tennessee is "still a real race." That sounds like a red wave taking place everywhere except Tennessee, which experiences a blue tsunami. Forgive me if that seems a bit implausible.
Alternatively, we can ignore articles that are plainly just DSCC/NRSC spin plsnted for NYT to run