to separate from a party

• 退党

to separate from a party的用法和样例：

例句

1. Such people should be persuaded to withdraw from the Party.
   这种人应劝其退党。
2. Kim Dae-jung withdrew from the party last month, claiming he hopes to stay above the limitations of the party during his last few months in office.
   金大中上个月已经退党，声称希望在他在职的最后几个月超乎政党界限之上。