Workin' it...
Rasmussen Reports, which for me is the pound for pound most accurate polling done today, has Mitt Romney back out in front of McCain by nearly the complete margin of error.
But for the time being forget the actual polling numbers and consider the little tidbit towards the end of the report concerning the "markets" leanings. In a very savvy move Rasmussen allows a free market approach to the prediction process and that "markets" are indicating a 56% chance of a Romney victory as opposed to the 42% chance McCain has at present. That number for McCain is deflated from nearly 70% immediately following the win in South Carolina.
Surprisingly - in this do or die for Rudy Giuliani - he's given only a 7% chance.