favorite son vs campaigner

favorite son and campaigner both are nouns.

Word	Noun	Adjective	Verb	Adverb
favorite son	Yes	No	No	No
campaigner	Yes	No	No	No

As nouns, campaigner is a hypernym of favorite son; that is, campaigner is a word with a broader meaning than favorite son:

favorite son: a United States politician favored mainly in his or her home state
campaigner: a politician who is running for public office

Other hypernyms of favorite son include candidate, nominee.

favorite son (noun)	campaigner (noun)
a United States politician favored mainly in his or her home state	a politician who is running for public office