The campaign of Governor Mitch Daniels plans to unveil a significant endorsement tomorrow, one more meaningful than Jim Schellinger’s endorsement by Judy O’Bannon, according to a campaign staffer.

It will come from a (so far) unnamed labor union and, while the campaign promises a “wow” factor, Daniels had a lot of labor support during the Major Moves debate.

Now if its the UAW, or AFSCME….