What do you think would happen in this situation: The President insists on making an appointment despite the fact that a key senator has invoked the rule of senatorial courtesy against that appointment?

The case was a u.s. supreme court decision that defined the scope of the u.s. congress's legislative power and how it relates to the powers of american state legislatures. the dispute in mcculloch involved the legality of the national bank and a tax that the state of maryland imposed on it.

Answer is mass marketing.