Trump brought the vax early, but never made it mandatory and now people are balking because it may not be effective and carries more risks than benefits. It's at flu shot territory. Some get, a lot pass on it. each year, and pols should be smart enough to go with that status quo.
Looking ahead to mid-terms, though, dems may want a no-vax / no in-person voting rule, figuring no vaxxers would be MAGA supporters and make rigging mail-ins easier. That means dems/GOPe have to go all in vax.
Watching Seth Keshel's state by state results, it looks like dems stuffed ballot boxes in all states, not just for a Bidan popular vote win, but for down ticket races as well. That may indicate that overall US dem support is a lot weaker than they're trying to gaslight us with. Would explain illegal surge, too. American dressed protestors in the streets all over the US, for optics, giving the impression that dem policies are what Americans want.
So, long story short, covid and vax are an election tool to elect a prescribed slate of candidates, and the good guys haven't come up with a way to stop it from working. Dems/GOPe will run variations of that play until it stops working.