The purchase of US Treasuries by Saudi Arabia is soaring under trump.  The bromance between trump and Mohammed bin Salman is well documented.  The best friend photo-ops, the US arms sales worth billions of dollars and, of course, trump choosing to over-look that little messy Jamal Khashoggi encounter.    The Saudis have been snapping up America's debt.  trump and his son-in-law know where the money is for their future business interests, they'll use anything to benefit themselves.