Guiliani. The far right is already trying to say he can't be elected but I think they are affraid he will show how little pull they really have compared with a moderate or either party.
the problem with the far right is they are so demanding of their beliefs or else, they cut them selves off and hand the seats to liberals.
for example I grew up in Westchester NY. It is considered a safe seat for democrats because the hard right won't compromise. If the Republican candidate is not anti-abortion, they put up their own candidate and so split the anti-democrat vote. If the republican candidate is anti-abortion the more moderate republicans don't vote but they don't put up a 2nd candidate. As a result Nita Lowe, the democrat, is considered quite safe.