Get ready for a New York vs a New Yorker. If Bloomberg runs, it will be an NYC trifecta.
Keep in mind that no Democrat from outside the South has carried a southern state since Humphrey won Texas in 1968 (and lost the rest of the South).
In such a case, I will probably hold my nose and vote for Giuliani, if only because he will not push socialized medicine and would be better on defense.