While researchers, librarians, and archivists have been working around the clock to preserve access to this historical record of research and data, if you rely on this data for your work you are strongly urged to download key datasets/ research works.
If they are Openly licensed, you can ensure access for others by uploading to Zenodo, which is a free repository run by CERN. The Library may be able to preserve websites facing the threat of removal via our institutional subscription to ArchiveIt. Email your subject librarian to nominate a site for preservation.
Additionally, Union of Concerned Scientists (US) has produced Resources for Federal Scientists, including Guides for responding to personal attacks, defending science for the public good, handling political harassment, and safeguarding online communications.