[cnn-photo-caption image= http://i.l.cnn.net/cnn/2008/images/02/09/art.rpcpac.ap.jpg caption="Rep. Ron Paul speaks at the Conservative Political Action Conference on Thursday."]
(CNN) - It's perhaps the most Shermanesque statement Ron Paul has ever issued concerning the potential he'll run as a third party candidate.
"I am a Republican, and I will remain a Republican," Paul wrote in a letter to supporters posted on his Web site. "I am committed to fighting for our ideas within the Republican Party, so there will be no third party run."
But the Texas congressman, who has shocked the political world with his grassroots fundraising success and army of devoted supporters, vowed to press on with his campaign, while acknowledging the chances of a brokered convention are "nearly zero."
"But that does not affect my determination to fight on, in every caucus and primary remaining, and at the convention for our ideas, with just as many delegates as I can get," her wrote.
But Paul, who has had trouble converting his grassroots energy into support at the ballot box, revealed he's making cuts to his field staff, and indicated he will shift much of his attention to his home district and the reelection race he faces there.
"If I were to lose the primary for my congressional seat, all our opponents would react with glee, and pretend it was a rejection of our ideas. I cannot and will not let that happen," he said.
- CNN Producer Alexander Mooney