I'm going through the same thing with my family so I think I understand what you're dealing with. It's a bit painful. But I really believe they will come around once they understand all the facts. They're kind people. They're still under a spell. When the spell is broken, of course they'll want to save mankind too.
When I pray for POTUS, I ask God to bathe him in a bright Light which is the Armor of God. That Light is an armor which no evil can penetrate. It repels all physical attacks, all evil intentions, all malicious words, all harmful spells, all duplicitous plans.
The Light which is the Armor of God also blinds our enemies so they stumble in the dark and always fail and look foolish and make bad decisions, while the Light shines the path for our President, guiding him always in fulfilling God's loving plan, revealing only truth, and giving our President the knowledge and words he can use to fulfill God's loving plan.
And I pray that our love and support for our President makes his burden lighter and easier so he only feels ease and happiness when facing his enemies, knowing that he is freeing the world and we are right by his side.