WI-Sen GOP Poll Watch: Former Governor Tommy Thompson Leading

According to the latest Club for Growth Poll.

The poll surveyed 500 respondents with a history of voting in GOP primary elections in the state and has a margin of error of 4.4 percentage points.

In a hypothetical head-to-head matchup against former U.S. Rep. Mark Neumann, who is also considering a run, Thompson received 40% of the vote and Neumann received 34%, with 27% undecided.