Outgoing Republican U.S. Rep. Tom Petri doesn’t strike us as a big fan of conservative state Sen. Glenn Grothman, who narrowly won the GOP primary last month in the race to replace Petri. When asked about Grothman by WisPolitics.com on Tuesday, Petri offered tepid praise for his possible successor, calling him “able.” Of course, Grothman jumped in the race before Petri announced his retirement, accusing the 35-year veteran congressman of not being sufficiently conservative.