"Tommy Thompson is IN" — running for the Senate seat Herb Kohl is about to get up out of.

Says David Blaska, who used to work for Thompson.

My old mentor will have beaucoup de competition in the Republican primary for Herb Kohl’s U.S. Senate seat this time around. He can bring in boatloads of national cash, name I.D. up the wazoo, and residual good will. Question: Will he be outflanked from the Right and if so, by whom?

I vividly remember hearing Thompson say, a year ago, that he shouldn't be the one to challenge Russ Feingold:

Thompson took a lot of credit for his work as Governor and claimed to have instituted many of the Tea Party values. But, he said, it's time for a new generation to take over, and, besides, he promised his family...

Ron Johnson accomplished the task of defeating Feingold. Now, looking at an empty seat, Thompson no longer wants to leave things to the younger generation? Why not?