[Coop]

Correct. Why did you say "They will have to hold onto them all and take some of the few Rat seats, too."

Sounds like you're implying that's the only way the Republicans hold the Senate. At 53-47 the GOP could lose three seats and still keep the Senate as long as POTUS wins re-election. Of course we don't want that, and I don't expect that, but trying to figure out what you meant by your post.

[Blood of Tyrants]

To get to 56 (your post #11) the GOP must hold most if not all seats and pick up 3 or more Rat seats.