I wouldn't be surprised if he's at 2/1 by this time next week, McCain will continue to drift out while the bookies cover their liabilities, they never lose their shirts in these kind of races..So if you fancy a bet on him today, he looks attractive...
I personally wouldn't bet on him, I like the fact that his maverick personality is the perfect foil to Hillary, but I think there will be problems in his life that will make him withdraw from this race... if that's the case, you won't get your bet back in this sketchy horse race, so I won't bet on sketchy horses...
I am not a better but I do find it interesting to learn about political betting.
Only time I bet is on the Triple Crown and then not much. My son and I won with Afleet Alex for no reason except the office he shares with a fellow grad student named Alex.