The Big Questions: Is It a Two-Way?

In the new issue of TIME (available to subscribers here), Mark Halperin looks at Cain's straw poll win, Christie's flirtation, and the flawed candidacies of Romney and Perry.

"By conventional measures, the GOP fight does look like a one-on-one affair. Romney and Perry lead in polling, fundraising, insider backing, and media attention. But both are also pockmarked with flaws."