Candidates are unleashing their final ads in Iowa, but also one last effort toward framing the choice in the minds of caucusgoers. On Sunday Mitt Romney chose a curious analogy in making the case that he is the best person suited to beating President Obama: The Kardashians.

I’ve been looking at some video clips on YouTube of President Obama, then candidate Obama, going through Iowa making promises,” Romney said. “I think the gap between his promises and his performance is the largest I’ve seen, well, since the Kardashian wedding and the promise of til death do we part.”

Obama the candidate was attacked in 2008 as being nothing more than a tabloid celebrity, with a McCain campaign ad that compared his appearances to that of Paris Hilton.

New on Twitter: Rupert Murdoch, who on Sunday sent a flurry of tweets including one praising Rick Santorum, hoping to score an upset and win the Iowa caucus. “Good to see santorum surging in Iowa. Regardless of policies, all debates showed principles, consistency and humility like no other.” Murdoch already has deleted one of his missives, an attack on Britain’s penchant for holidays. “I”m getting killed for fooling around here and friends frightened what I really might say!”

Slamming SOPA: David Carr of the New York Times comes out against the pending anti-piracy legislation in Congress. He writes, “I like my movies (and music and television) as much as the next couch potato, probably more. And I wouldn’t steal content for any reason, in part because I make a living generating a fair amount of it. But it’s worth remembering that the film industry initially opposed the video cassette recorder and the introduction of DVDs, platforms that became very lucrative businesses for them and remarkable conveniences for the rest of us.” He notes that although Hollywood has a extensive list of connections to influential politicians to draw upon for supporting the legislation, the Web has the full force of the online community.