How to deal with targeting of trans child

My beautiful trans lesbian daughter's partner (who is also trans) is in academia and unfortunately for the past few months, a worthless, terrible, transphobic Republican garbage human being and state rep has been targeting her on the app-formerly-known-as-Twitter and other social media. He repeatedly keeps posting her name, her face, her college, etc and directing hate/bullying at her. She's a brilliant, gentle, loving, and kind published poet, and I cannot keep just waiting and hoping the broken @sshole will find something else to spew his vile hatred at.

Is there anything I can do outside of trying to support her with kind words, care packages, etc.? I'm disgusted by the state of my country and how this type of behavior is being allowed and encouraged. I'm completely lost and scared she (and my daughter) will be harmed or worse. Any ideas appreciated!!