"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?