The Trump crime clan are in debt (in money & favours) to the Saudis, along with UAE, Qatar, Israel, Russia, China & Ukrainian Semion Mogilevich (global boss of bosses) to name but a few.
Fred Trump (Donald's dad) family, was a front family for the Genovese mafia gang, so Donnie was born into a momster family and has been grifting all of his life. Once you work or are compromised by the mafia, they own you for life. Expect the Trump clan breaking the US Emolument laws to form a big part of Robert Muller's investigation and prosecution. This is going to be the biggest global elite crime bust that any of us will ever witness as it is massive.
https://en.wikipedia.org/wiki/Semion_MogilevichTrump's daughter & son-in-law have borrowed & been well paid for 'deals' to the tune of $500m by the Saudis so don't expect anything but obstruction from Trump including not warning the journalist where the NSA had SIGINT that was forwarded to Trump in one of his daily intelligence briefings that the journalist was going to be kidnapped or despatched (normal protocol for a US citizen is for the President to order that the target is warned of the danger & Trump didn't) and that is what the 15 man team that went to the Saudi embassy job was, which included members of Saudi leader MBS security staff. Those 15 where they have been videoed & implicated will now be despatched as dead men don't talk. One has already died in a car accident. In dictatorships it is normal for anybody that badly crosses or even worse embarrasses the regime to be despatched. In the West we only get to hear about the famous ones, the rest just disappear without trace.