I missed this nugget a few days ago (and have no idea how reliable it is), but The American Spectator's "Washington Prowler" reported that at least some of the McCain aides who've been badmouthing Sarah Palin--including the one who offered the famous "diva" quote--are former Romney staffers:

Former Mitt Romney presidential campaign staffers, some of whom are currently working for Sen. John McCain and Gov. Sarah Palin's bid for the White House, have been involved in spreading anti-Palin spin to reporters, seeking to diminish her standing after the election. "Sarah Palin is a lightweight, she won't be the first, not even the third, person people will think of when it comes to 2012," says one former Romney aide, now working for McCain-Palin. "The only serious candidate ready to challenge to lead the Republican Party is Mitt Romney. He's in charge on November 5th."  ...

Some former Romney aides were behind the recent leaks to media, including CNN, that Governor Sarah Palin was a "diva" and was going off message intentionally. The former and current Romney supporters further are pushing Romney supporters for key Republican jobs, including head of the Republican National Committee. 

Apres McCain, le deluge.

--Christopher Orr