Chase Strangio from the ACLU has "7 Action Items to Protect Trans and GNC People" (link below), which notes that many proposed changes to federal regulations have to go through something called "notice and comment," so there will likely be a comment period for this -- and in the meantime there are trans advocacy orgs to support, trans candidates to support, and the Yes on 3 campaign in Massachusetts to support (all listed in the link below).
not a script, but re: the HHS memo
https://www.out.com/news-opinion/2018/10/21/hell-no-memo-7-action-items-protect-trans-and-gnc-people