The damage for the next four years is done. The question is, even if there's a major shift back to sanity with the next prez elections, it'll take years to build up trust and the mechanisms, find and hire talented people willing to do the work, or even find enough talent because of all the grad students and post-docs that are _not_ employed by research labs in the next four years.
It'll take at least a decade to recover, and that may be optimistic. If others fill the gap (China will try but their credibility is low, which is the US's only saving grace), this could be a permanent degradation of the US's research capabilities.
Insane.