You should first check the website of the US (American) Federal Government Agency you are interested in. However, we are aware from that when changes happen in the administration (Presidency) certain data sets have been removed.
Sources you can check for archived or mirror data sets include:
This is an evolving situation so you may also want to search for relevant news items in the press and journals in your research area. You could also search for hashtags relevant to your area on social media.