I encourage Americans to call their representatives to urge them to vote against HR 9495, which would let the US Treasury Department revoke nonprofit status of any organization it calls a supporter of terrorism without any evidence whatsoever.
https://www.congress.gov/bill/118th-congress/house-bill/9495
You can find them here, if you don't know who they are or their phone numbers: https://www.congress.gov/members/find-your-member