Palin had beaten Murkowski in 2006 in a primary battle in which she campaigned as a reformer and backed an unsuccessful 2010 challenge to Murkowski's daughter, U.S. Sen.

CNN: E-mails: Palin moved to tie oil scandal to ousted rival

In 1994, Fitzgerald waged an unsuccessful primary challenge to Crane.

CNN: Candidate Profile from Congressional Quarterly

Teams are permitted two opportunities per innings to contest an on-field decision, losing a challenge for an unsuccessful review.

BBC: World Cup set for umpiring move