There are any number of other potential candidates who have just as much capability as Rudy, without the baggage and skeletons in the closet. Giuliani is a liberal, even his own mother said so.
I don't know how many ways to put this. 2008 is not going to be a normal year. It's not about our lesser-known politicians, this is going to be a battle royal and right now the Dems reading this are probably saying: YES~! we will beat them hands-down in 08.