Ryan Sager writes some very decent puffery stating that Giuliani appears to be favored over McCain and that a socially liberal Republican from the northeast would now be "acceptable" in the south and west. He bases his analysis on a recently released Gallup poll which apparently actually uses the term 'acceptable' in one of its questions. He also posits Giuliani as the "clear leader" on the basis of a 29/24 split in Giuliani's favor in a poll for which he does not state the MOE.
Should the race come down to a Giuliani/McCain choice (bearing in mind that neither received even one-third of the respondents support) then I believe that Giuliani might prevail - if he clearly identifies the type of individual whom he would appoint to the bench. McCain has proven to be entirely undependable with regard to judicial appointments and will receive, at most, lukewarm support from those who give primacy to that aspect of a nominee's curriculum vitae and Giuliani shares with McCain (and with Gingrich) lapses in personal conduct which will not redound to an advantage for any one of them.
Mr. Sager also neglects to emphasize that Giuliani has very few ties at the national level within the party. He is not noted as a team player (nor is McCain). If Miz Clinton is the opposing candidate then either man would win but it would not be on the basis of popularity and trust but upon the choice of a lesser evil.
It is still a bit early to try and follow this very closely but I do expect that McCain will receive a considerable amount of negative press coverage, beginning in November from the same MSM who lovingly patted the head of their favorite 'maverick' in a soon to be forgotten past.