Wiktionary
presidentially
adv. In a presidential way.
Usage examples of "presidentially".
He introduced himself as Drei Silveris, presidentially appointed aide to Professor Korl Harland.
Kennedy didn't conform to the 1960 ideal of what a President should look like -sage, paternal - but he had other things going for him, and by winning he altered the model to some degree, benefiting, among others, Paul Quinn, who was presidentially plausible because he was Kennedyesque.