Cannon faced opposition in the primaries from a fellow Republican for the first five times he ran (and won), but his opposition in 2006 seemed potentially stronger. In October 2005, millionaire real estate developer John D. Jacob announced that he would run against Cannon in 2006. In May 2006, at the state GOP convention, Jacob surprised Cannon by winning 52 percent of the delegate ballots to Cannon's 48 percent—a shocking result for a five-term incumbent. Had Jacob won 60 percent of the delegate ballots, he would have won the nomination outright and ended Cannon's career. Team America PAC, a PAC dedicated to strict immigration enforcement, spent $50,000 on a radio advertising campaign attacking Cannon for his views on immigration ("A vote for John Jacob is a vote for cleaning up the immigration mess Chris Cannon helped make.")