The continuing resolution is the one near-term lever Democrats might have to limit the Musk/Trump administration lawbreaking.
A current tally of positions on the Continuing Resolution makes it quite clear that things are very much in flux right now, which makes constituent pressure important. Call your senators and tell them to oppose.
Because of basic game theory. The US is a two-party state for fundamental structural reasons.
That said, the identities of the two parties have changed every once in a while. Seems like they’re overdue for another such shakeup at this point, but who knows when it’ll come. Could be that the two existing parties have figured out how to stall that.