campaigner vs political leader

campaigner and political leader both are nouns.

Word	Noun	Adjective	Verb	Adverb
campaigner	Yes	No	No	No
political leader	Yes	No	No	No

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

Other hypernyms of campaigner include pol, politician, politico.

campaigner (noun)	political leader (noun)
a politician who is running for public office	a person active in party politics