There is no way Tommy is going to comeback to run for Gov. He's either going to announce he is not running for anything or else he's going to run for Kohl's seat. Going for a Senate seat after being Gov and a member of a cabnet is a step down, but Tommy is a Republican. He is a team player.
He is the only man who could beat Kohl and he is needed in the US Senate. This could be a blockbuster.