Campaign finance reform provided the most dramatic moment in the candidates' last encounter, held in the upstate city of Buffalo in September, when Long Island congressman Lazio confronted Clinton with demands she sign a deal to eliminate the use of soft money in their campaigns.

CNN: Clinton hits Lazio over campaign reform in New York debate

In another, one of Cobb's sons stands in front of a Coca-Cola sign a fitting juxtaposition because Cobb made millions as an early investor in the soft-drink company.

WSJ: Ty Cobb: A Juicy Look At the Georgia Peach

Although Mr Bush opposed any restrictions on soft money while he was running for the presidency, since taking office he has said he will sign any legislation which "improves the system" now in place.

BBC: US campaign finance 'set for overhaul'