One thing I've learned the hard way - you can't argue with fools lest you become one too (or reason with an unreasonable person). The best thing is just to drop it and leave them be. They've already made up their mind even before the lines were drawn. Perhaps by osmosis she will hear some information from some source that will kick start her brain to think logically and critically and she will figure oI that she's been lied to and manipulated. I have seen this same type of thing happen recently in my own family but after they heard about the evil side of Hillary they changed their vote to Trump. They had no clue about her past. I told them what they actually do at Bohemian Grove (infant sacrifice to Molech and / witchcraft), the parties with a Satanic theme, and her long term relationship with a guy who wrote a book and dedicated it to Lucifer plus a little info anoint the Lolita Express trips and info from her past SS guys who protected her had to say about her.
Thanks for your suggestion. Am glad some among your liberal family members were able to “see the light” and vote for Trump. I can only pray that my liberal family member will have a similar “awakening”.