Whig vs political leader

Whig and political leader both are nouns.

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

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

Whig: a member of the Whig Party that existed in the United States before the American Civil War
political leader: a person active in party politics

Other hypernyms of Whig include pol, politician, politico.

Whig (noun)	political leader (noun)
a member of the political party that urged social reform in 18th and 19th century England; was the opposition party to the Tories	a person active in party politics
a supporter of the American Revolution
a member of the Whig Party that existed in the United States before the American Civil War