Besides his FIL (Trump) and his wife (Ivanka) who is a supporter Jared Kushner being so intimately involved in running the country? Why?

We know  Steve Bannon isn't a Kushner supporter. Stevo Banno is an active anti-Kush guy. Scuttlebutt is some White House lawyers want Kush gone. Would like him to resign. Probably daddy-in-law won't like that much. Besides nepotism why is Kushner there? What is his particular expertise that only he can bring to helping Trump run the world or ruin it?