# 2006 United States Senate election in Wisconsin

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vte :
The 2006 United States Senate election in Wisconsin was held November 7, 2006. Incumbent Democratic U.S. Senator Herb Kohl won re-election to his fourth and final term in a landslide. As of 2025, this is the most recent state-wide election where any candidate won every county in Wisconsin.

## Democratic primary
### Candidates

* Herb Kohl, incumbent U.S. Senator
* Ben Masel

### Results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Herb Kohl (incumbent) | 308,178 | 85.66% |
| | Democratic | Ben Masel | 51,245 | 14.24% |
| | Democratic | Write ins | 335 | 0.09% |
| Total votes | Total votes | Total votes | 359,758 | 100% |

## Republican primary
### Candidates

* Robert Lorge, attorney

### Results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Robert Lorge | 194,633 | 99.73% |
| | Republican | Write ins | 530 | 0.27% |
| Total votes | Total votes | Total votes | 195,163 | 100% |

## General election
### Candidates

* Robert Lorge (R), attorney
* Herbert Kohl (D), incumbent U.S. Senator
* Rae Vogeler (G), community organizer

### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Solid D | November 6, 2006 |
| Sabato's Crystal Ball | Safe D | November 6, 2006 |
| Rothenberg Political Report | Safe D | November 6, 2006 |
| Real Clear Politics | Safe D | November 6, 2006 |

### Polling

| Source | Date | Herb Kohl (D) | Robert Lorge (R) |
| Strategic Vision (R) | March 8, 2006 | 59% | 27% |
| Strategic Vision (R) | April 12, 2006 | 61% | 25% |
| Strategic Vision (R) | May 3, 2006 | 63% | 25% |
| Strategic Vision (R) | June 8, 2006 | 65% | 25% |
| University of Wisconsin | July 5, 2006 | 63% | 14% |
| Rasmussen | July 20, 2006 | 60% | 27% |
| Rasmussen | August 20, 2006 | 59% | 31% |
| Zogby/WSJ | August 28, 2006 | 51% | 33% |
| Zogby/WSJ | September 11, 2006 | 50% | 35% |
| Rasmussen | September 25, 2006 | 60% | 33% |
| Rasmussen | October 29, 2006 | 64% | 25% |
| University of Wisconsin | October 30, 2006 | 73% | 16% |

### Results

2006 United States Senate election, Wisconsin :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Herb Kohl (incumbent) | 1,439,214 | 67.31 | +5.8 |
| | Republican | Robert Lorge | 630,299 | 29.48 | −7.5 |
| | Green | Rae Vogeler | 42,434 | 1.98 | n/a |
| | Independent | Ben Glatzel | 25,096 | 1.17 | n/a |
| | Other | Scattered | 1,254 | 0.06 | n/a |
| Majority | Majority | Majority | 808,915 | 37.83 | |
| Turnout | Turnout | Turnout | 2,138,297 | 50.86 | |
| | Democratic hold | Democratic hold | Swing | | |

#### Counties that flipped Republican to Democratic

* Calumet (largest city: Chilton)
* Outagamie (largest city: Appleton)
* Waupaca (largest city: New London)
* Waushara (largest city: Berlin)
* Green Lake (Largest city: Green Lake)
* Ozaukee (Largest city: Mequon)
* Washington (Largest city: West Bend)
* Waukesha (Largest city: Waukesha)

## Analysis

Kohl won every county in the state. Kohl's weakest performance in the state was suburban Washington County, Wisconsin, which Kohl won with just 49.6%. Kohl's strongest performance was in rural Menominee County, where he won with over 90% of the vote. Vogeler's best performance was in Dane County, where she came in third place with over 5%, a county where Lorge had his second weakest performance.