At its June 2012 meeting, the Santa Barbara County Republican Central Committee refused to endorse Abel Maldonado for U.S. House, 24th district, even though he is the only Republican on the November 2012 ballot. The other person on the ballot is incumbent Democrat Lois Capps. See this story.
Maldonado supporters will attempt to obtain the party’s endorsement at the July meeting, and are also threatening members of the committee with removal for their failure to endorse Maldonado. However, under the legal theory behind top-two, parties don’t have nominees, and therefore there seems to be no legal theory that would punish a party official body for refusing to endorse someone.