Did Santorum tip Ensign?

Howard Kurtz, in an online chat today, says maybe so (ea):

Boston: Did Megyn Kelly or FOX notify Senator Ensign of his former staffer's letter? The Senator's timing seems fishy (coming clean a year late, but a couple of days after Ms. Kelly was first notified).

Howard Kurtz: There is no evidence that Fox or Megyn Kelly notified Ensign, as they took no steps to pursue the story. But someone clearly tipped off Ensign. A source tells me that former senator Rick Santorum, who happens to be a Fox contributor, happened to separately receive the Hampton letter. But I don't know if he told his former colleague Ensign about it or not.