noun which may take the genitive case particle 'no'
anti-party
Used in political contexts to describe actions, factions, or sentiments opposing a political party, often within the party itself.
彼は反党的な発言をしたとして党から除名された。
He was expelled from the party for making anti-party remarks.
反党活動は厳しく取り締まられた。
Anti-party activities were severely suppressed.