An anonymous reader writes "AP is reporting that Republican presidential candidate Ron Paul raised more than $3.5 million in 20 hours on Monday. The total was driven by a surge of Web-based giving tied to the commemoration of Guy Fawkes Day. Paul's total beat Mitt Romney as the single-day fundraising record holder in the Republican presidential field. Paul now ranks only behind Democrats Hillary Rodham Clinton, who raised nearly $6.2 million on June 30, and Barack Obama. Paul advocates limited government and low taxes like other Republicans, but is the only GOP presidential candidate opposed to the Iraq war."