I have no idea if more AMA members are registered Republicans or Democrats. Based on the fact that Dems outnumber Republicans by seven or eight million in the US, I'd have to make some kind of stat guess that there are more Dems, but based on socioeconomics, I'd just as soon guess Republican AMA plurality.

However, having said that, it's pretty clear that a formal bureaucratic "cancel culture," -- call it what it is, CENSORSHIP -- was in play from the top down for all major US medical institutions and organizations vis-a-vis the Covid-19 not-vaccines. I say "not-vaccines" because that is their current legal status in at least one US state, which may serve as precedent for the country. So a medical cancel culture censorship was clearly being employed (or forced upon) all of these medical organizations.