Unfortunately our favorite tracking poll from Reuters/C-Span/Zogby is only of limited help this time. We can say with some confidence that the winner will be either McCain or Romney. Both are tied on 29.9% (actually McCain has a marginal lead244 to 240 respondents) but the trend seems to be slightly Romney's way (he has caught McCain up).
The news looks really bad for Giuliani who is sitting on 12.5% in 4th place. He should withdraw now and endorse McCain.