factionalism; partisan spirit
Refers to a strong loyalty to one's own faction or party, often with a negative connotation of putting group interests above broader concerns. Used in political, organizational, or social contexts.
Factionalism within the party is delaying policy decisions.
His judgment was swayed by partisan spirit.
党利党略 emphasizes party interests and tactics in a political context, often more strategic than the attitudinal 党派心.
Compound of 党派 (tōha, 'faction, party') and 心 (shin, 'heart, spirit'). The exact historical derivation is uncertain, but the word follows a common Sino-Japanese pattern for abstract qualities.