WASHINGTON (AP) -- Mitt Romney's supporters in Wyoming have successfully challenged a delegate to the party's national convention that had been awarded to rival Rick Santorum -- showing the lengths the campaigns are willing to go to fight over a single delegate.

State GOP Chairwoman Tammy Hooper said Tuesday the delegate is now awarded to Romney.

The Santorum delegate was initially elected on the third ballot at the Park County convention earlier this month. The Park County Republican Executive Committee voted unanimously Monday night to change the results, saying the third vote was held improperly. A Romney delegate had been elected on the second ballot.

Twelve of Wyoming's 29 delegates were elected at county conventions earlier this month. Romney now has eight, Santorum has two, Ron Paul has one and one is uncommitted.