What’s the deal in Nebraska? Will the new senate be conservative enough to pass anything?
They're one vote short of being able to break a filibuster, so as long as the Democrats are totally unified, no. There is one Democrat representing a Trump+30something seat, but she's termed out in 2024, so there's no reason for her to cross over for the sake of reelection.
Even if they did have a filibuster-proof majority, there are enough R moderates that a total ban is likely close to impossible. 15 or 12 weeks might be doable, but not anything more.
The question is whether a filibuster-proof majority can be averted in 2024, assuming that seat reverts back to R. It looks like there will be an open seat that includes part of Lincoln, so it should be possible. The seat that includes Bellevue is also competitive, but presumably the incumbent there will be running for reelection.