Warren has declared she won't run. Bernie Sanders, meanwhile, is looking on the Democratic side.
O'Malley can try if he wants, but losing a blue state like Maryland, even if in a Republican wave year, is really going to hurt his ability to get others to believe in him.
It'll be Clinton against somebody like Sanders who will lurch to her left. Biden, possibly, if Sanders really fizzles.
On the right, i'm surprised Paul Ryan declared he was out. Bush, Romney, and Walker look like their big three. Christie, possibly, if Bridgegate from the left and his (in)famous photo with Obama after superstorm Sandy from the right don't leave him dead in the water. Moderates will see a governor who functions like a mafia thug, while Partiers will only see that photo.