The 2022 senate slate looks promising for the Dems, there are 2 republicans in seats the dems should win in PA and WN. Florida will be tight especially as Rubio is standing down.
There will be a few Republicans who back any wild Trump actions even though they know he will lose as they have an eye on the White House.
Is Rubio standing down? I haven't seen that. I would imagine he'll want another run at the White House in 2024.
The Senate map is alright for the Dems in 2022, but it's very rare for the party in control of the White House to pick up Senate seats in the midterms (although Trump managed it, so who knows). The Senate map is pretty awful for the Dems in 2024, and the way things stand, the system is tilted heavily in Republicans' favour, which makes it even more crazy that the Dems will soon have control of everything.