On the Rappapport accusations, this response from Romney spokesman Kevin Madden:

There is a nastiness emerging from Rudy Giuliani’s campaign these last few days, which seems to be the result of a certain level of desperation in the face of weak showings in early state polls.
Governor Romney’s support is growing with grassroots Republicans because he is the candidate with the vision, the experience and the values to lead the Republican Party and the nation. Mayor Giuliani is at odds with Republican voters on so many important issues that he would be at a distinct disadvantage when it comes to contrasting his positions with Senator Clinton and the Democrats.