partisanship       
noun [ U ] uk/ˌpɑː.tɪˈzæn.ʃɪp/ /ˈpɑː.tɪ.zæn.ʃɪp/ us/ˈpɑːr.t̬ə.zən.ʃɪp/
 党派性;派系行为
the quality or action of strongly supporting a person, principle, or political party, often without considering or judging the matter very carefully
  There was a certain partisanship about the way that votes were cast. 投票的方式体现了一定的党派性。 
 He promised he was going to end partisanship. 他承诺将结束派系行为。 
 See: partisan
 - More examples
 - We need less partisanship in government.
 - It was a time of bitter political partisanship.
 - The leaders wanted no part of such extreme partisanship.