Governor Frank Murkowski, suffering poor approval ratings, was not favored to win renomination. An August 8 poll by Rasmussen Reports showed that going into the primary election his approval rating was at 27%, while his disapproval rating stood at 72%. Former Wasilla Mayor Sarah Palin and former state Railroad Commissioner John Binkley challenged Murkowski in the Republican primary. Former governor Tony Knowles was widely considered the favorite to win the Democratic nomination. In the primary held on August 22, Palin won the Republican nomination for governor with 51.1% of the vote, Binkley received 29.6%, and Murkowski received just 18.9% of the vote. Knowles won the Democratic nomination with 68.6% of the vote; state representative Eric Croft, who received 23.1% of the vote, was his nearest competitor.