Donald Trump
Biggest Potential Boost to Candidate's Image: South Carolina Gov. Nikki Haley, New Mexico Gov. Susana Martinez.
Clearest Path to 270 Electoral Votes: Ohio Gov. John Kasich, Florida Sen. Marco Rubio, Florida Gov. Rick Scott, Wisconsin Gov. Scott Walker.
Biggest Potential Benefit to Governing: South Carolina Sen. Lindsey Graham, Rubio.