But can you imagine someone joining the Federalist Society solely because she believes in the federal system of government?
In Canada, relations between the federal system and the provincial system are much more fraught — often antagonistic.
As David Plouffe detailed in his book, The Audacity To Win, the campaign had committed in writing to stay in the federal system.
1640s, as a theological term, from French fédéral, from Latin foedus (genitive foederis) "covenant, league, treaty, alliance," related to fides "faith" (see faith).
Meaning "pertaining to a treaty" (1650s) led to political sense of "state formed by agreement among independent states" (1707), from phrases like federal union "union based on a treaty," popularized by formation of U.S.A. 1776-1787.