Olympic +50000 (that's 500/1) on an independent taking the white house in 2008. Max bet: $500 to win $250K. Hey, stranger things have happenned.
Consider that the current Intrade market for the same bet (admittedly for extremely small size) is about -5782 @ +4445.
Consider that the current Intrade market for the same bet (admittedly for extremely small size) is about -5782 @ +4445.