He is a smooth operator who always gets what he wants.
smooth operator
idiomA person who accomplishes tasks with efficiency and grace, especially one with verbal skills who is persuasive in interpersonal relationships, negotiation, etc.
The new manager is such a smooth operator that he convinced the entire team to work overtime without a single complaint.
With his effortless charm and calculated rhetoric, the politician proved himself a smooth operator capable of navigating even the most hostile debates.