A message left for Cardon at his office was not immediately returned.
Cardon was a co-chair of former Massachusetts Gov. Mitt Romney
's (R) Arizona finance steering committee
in 2007, and is friends with Romney's son Tagg
Cardon would only be the latest self-funder to pursue a Senate campaign if he runs. Last cycle, self-funders found mixed results
in statewide races: Linda McMahon
(R) and Meg Whitman
(R) won the GOP nominations in statewide races in Connecticut and California, respectively, but ultimately lost general election contests despite spending huge sums of money. In New Hampshire, Bill Binnie
(R) spent a lot on the Senate race, only to see his support decline rapidly toward the end of the primary. Jeff Greene
(D) did not even make it out of the Democratic primary in Florida. Now-Sen. Ron Johnson
(R-Wis.) found success in 2010, as did now-Florida Gov. Rick Scott
Flake appears to be in very strong position, having put up solid first quarter fundraising numbers without a clear opponent in either party in sight. Rep. Trent Franks
(R), who was seriously mulling a bid, recently announced that he will not be running for Kyl's seat.