Threaten to donate to a primary opponent. The Senate office number is 202-224-6551.
We can't shrink down the stimulus bill, because it's already too small. And the cuts he want to make are some of the items most effective in stimulating the economy, and would help regular people the most. We need every dollar in there to prop up the US economy.
I just called and threatened to give money to any primary opponent if he doesn't cut this out. A flood of calls threatening the same thing might help.
And if Nelson does go through with this, he deserves a primary. It would probably be better to have a Republican in there, because since Nelson is nominally a Democrat, it plays into a media narrative that says that the "moderate" thing is to cut out funding for vital, popular programs that would effectively stimulate our depressed economy. One more Republican would just blend in with that crowd, but a disloyal Democrat can make news. And if a Republican wins the seat, we can try to knock him out with a real Democrat next time.