party boss

n. 党的首领, 党魁

例句与用法：

The newcomers think that if old George didn't get the nomination this time he would loyally stand down and make way for a younger man. The party bosses know different.

新来的人认为如果老乔治这次没得到提名，他会老老实实地退出竞选，让位于年轻些的假选人。党派的头头们却不这样看。