Her trends are down and his are up. I think these new national polls lend credence to the electability argument. For Democrats for whom victory in the fall is of preeminent importance, the evidence speaks for itself.

http://rasmussenreports.com/public_content/politics/election_20082/2008_presidential_election/general_election_match_up_history

He's also moving well ahead in the head to head poll against Clinton

http://www.gallup.com/poll/106945/Gallup-Daily-Clinton-49-Obama-45.aspx?loc=interstitialskip