At this point in time, Romneys biggest liability is the ultra-Conservative wing of his party. While Romney is a right of center moderate, they are forcing him to accept positions that will keep him from winning a potentially winnable contest
Actually, being candid, Mitt is much more "moderate" than "right of center." He is -- in point of fact --clearly
left of center.
But if the right side of the GOP can steer him a bit more to the right in his thinking, words and action, Romney MIGHT just get enough backbone to start effectively opposing the ultra-liberal incumbent.
Mitt's actual main liability is his detached and lackluster campaigning.