And no, they were not part of the founding.
Federalists like Hamilton, Adams, even Washington, though not officially a party member were for big federal centrally controlled government....
They were called the Federalist Party....
Much like today’s liberals....mind you I didn’t say progressives....an entirely different animal...
Loyalists were not liberals or part of any early political party or better said “movement” as the concept of a political party was not really an actual organization yet....