ABC’s Jon Karl takes an early stab at Romney’s VP short list.
Top Tier: Rob Portman, Marco Rubio, Jeb Bush
Second Tier: Chris Christie, Mitch Daniels, Bob McDonnell, Paul Ryan
Women: Kelly Ayotte, Mary Fallin, Nikki Haley, Susana Martinez
Due to his recent penguin bite, Newt was left off the list.