While anti-science exists at both ends of the political spectrum, only one of the major us political parties seems to embrace conspiracy theories with gusto. And that party has a not insignificant number of adherents that accept the belief that covid is a hoax.

But notice that you've shied away from the climate change claim; the scientific consensus has not gotten softer in the last 20 years, but as recently as a few years ago one party denied the existence of climate change. Even recently a considerable majority of the strong adherents of one particular political party disbelieve that climate change is happening.