Avery Knapp is typical of the Paul Web supporter. A 28-year-old radiology resident, Knapp describes himself as a lifelong conservative who voted for President Bush in 2000 before growing disillusioned with the Iraq war and federal spending. Bush "did nothing but increase the size of government. The Republican Party needs to move back to its core principles," Knapp said. Many Paul supporters share Knapp's disdain for what he called a "neo-conservative clique" and hope Paul can spark a Goldwater-style insurgency. At 46, Kevin Leslie has never bothered with politics. After watching an interview with Paul during his 1988 campaign as...