Now, the U.S. can send a subte message to King Salman and the Saudi Royal family by having minimal contact and interaction with the Crown Prince.
The Saudis can choose whoever they want to be King. But they should know that Americans will never forget or forgive the assassination of Jamal Khashoggi.
If the Saudis enthrone MBS they are likely to have one kind of relationship with the United States. 8ut if they choose someone else to be King, they could have another kind of relationship.