federalist

Advocate of federalism.

Supporter of the view that the province of Québec should remain within the Canadian federal system; an opponent of Québec‐based separatism or sovereigns.

A covenantalist.

Of or relating to federalism, or its advocates.

A member of the Federalist Party, an 18th- and 19th-century conservative, liberal US political party which was one of two major parties under the First Party System.

No good Federalist has at present any wish to shake the fair and stately pillars of its fabric, and o'er its lamented ruins to erect the frightful columns of uncouth monarchy.