Eli Lake, national security reporter at the Daily Beast, says
AIPAC is sitting out the Hagel fight. And with Eli's sourcing, he would know.
The gist seems to be that it's not worth it. The White House is going to win this fight. Not easily necessarily. But they're going to win. And there's nothing to be gained by fraying the relationship with a Hagel Pentagon or with the White House for that matter.