Deal Between Specter and Obama?

Quinn Hellyer at Confirm Them expounds on a theory behind Arlen Specter's letter to Obama asking him to renominate up to three of Bush's judicial nominees (here).  Hillyer's speculation:

"So here's how I suspect (this is pure speculation; no inside info at all) this went down: Obama's people and Specter made a deal: Specter stops harassing Holder, and in return he'll get Diamond and Short renominated and confirmed. To put a fig leaf over the deal, Specter's letter would mention Keisler (to placate conservatives) and Glen Conrad as well."

Time will tell.