disendorse

dis- +‎ endorse

disendorse (third-person singular simple present disendorses, present participle disendorsing, simple past and past participle disendorsed)

1. (transitive) To cease to endorse; to withdraw endorsement.
   • 1980 Nov. 9, "Headliners: Victory, Chicago-Style," New York Times (retrieved 26 May 2013):

     Even though firmly disendorsed by Mayor Jane M. Byrne of Chicago in a fearful Democratic Party squabble, Illinois State Senator Richard M. Daley, son of the late Mayor Richard J. Daley, won election as Cook County State's Attorney last week.

   • 2012 Feb. 21, Sean Parnell, "Queensland state election campaign takes bitter turn," The Australian (retrieved 26 May 2013):

     On the third day of the campaign, Labor has been forced to disendorse and expel its candidate in the unwinnable seat of Southern Downs.

• sanction