https://actionnetwork.org/letters/tell-your-secretary-of-state-and-attorney-general-stop-last-minute-voter-purges?nowrapper=true
https://stallman.org/actionnetwork-letter-instructions.html

US citizens: call on your state's Secretary of State and Attorney General: Stop Last-Minute Voter Purges. See the instructions for how to sign this letter campaign without running any nonfree JavaScript code--not trivial, but not hard.