(CNN) – Ahead of his state's GOP caucuses on Saturday, the Washington Republican Party chair on Friday predicted a win for either Mitt Romney or Ron Paul.
The turnout required for a win can be bolstered by a well-organized ground campaign, and Kirby Wilbur told CNN that Rick Santorum and Newt Gingrich "don't have the infrastructure, the ground game to follow up on turning the vote out."
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"You've got to have people turn out, and if you don't have people reminding them to turn them out, show them where the caucuses are, that's a disadvantage," Wilbur said.
He did not eliminate the possibility of a win by Santorum or Gingrich, and said the time Santorum spent campaigning in Washington on Thursday was not wasted.
"No, it's not a waste of time at all because if he can shore people up then he can get them out," he said of Santorum. "He's got a shot, but just the advantage rests with Romney and Paul because they have people on the ground every day calling."
All four candidates have campaigned in Washington in the last two weeks. Romney held a rally in Bellevue on Friday, and Paul held town hall meetings in Spokane, Ridgefield and Seattle.
Santorum was in Spokane and Pasco on Thursday, and held a tele-town hall meeting with voters on Friday. Gingrich went to Washington on the heels of the February 22 CNN debate in Arizona, and visited Olympia, Federal Way, Everett, Kennewick and Spokane.
Wilbur predicted high voter enthusiasm, as he could not remember a time when all of the major presidential candidates campaigned in his state. In 2008, the state held both caucuses and a primary, each choosing half of the state's pledged delegates.
"This is the most exciting time for Republicans in Washington state history in my book," Wilbur said. "We've never had the enthusiasm or the turnout. We're excited. I predict record and high levels of enthusiasm tomorrow for all of them."
– CNN's Gregory Wallace contributed to this report.