The federal government was the George Washington in convention
It doesn't have a definition it's a phrase president Thomas Jefferson used in his first inaugural address in 1801 calling for a cautious, isolationist foreign policy
The Great Commoner--for his ability to connect to the common man.
William Jennings Bryan had an ability to speak but also connect to the ordinary American person. He connected to the rural communities and eventually became the leader of the Populist Party and the Democratic Party. He believed in fundamental Christianity, temperance, farming, the common people.