OP here. I would like to thank everyone for their thoughts, advice, and prayers. I have decided that for now, rational argument (based on scripture, morality, history, etc.) is probably not the best approach with my daughter. While the untrustworthiness of Mormon founder JS was the “magic bullet” for me and others, I don’t think it will be for her at this time. I will, as others have suggested, focus on prayer, love, and example. When I see an opening, I will kindly attempt a rational argument and I believe Joseph Smith is a good place to start when the time comes.
Though it is tempting to despair, there is also much to praise God for in my family. My younger daughter joins me at mass every week, is enrolled is Catholic religious education starting next month, and likes to rock out to “Cat Chat” when we’re in the car. Perhaps one day there will be unity of faith in my home. Until then, I know what to pray for–unity of faith in my family and in the world, reconciliation in my family and in the world, peace in my family and in the world.
A kind man I knew in my last parish told me, “My wife is a cradle Catholic. Me… it took me 18 year to join her as a Catholic… and another 18 years to become an involved Catholic.” This is a marathon we are in, not a sprint. All things work in God’s time, not mine. I would love for things to speed up and for mistake to be avoided, but there are things I cannot control.
There is time, I pray. There is hope. Thank you all.