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2018 Wisconsin Senate election
←  2016 November 6, 2018 (2018-11-06) 2020 →
17 of the 33 seats in the Wisconsin State Senate
17 seats needed for a majority
  Majority party Minority party
 
Leader Scott Fitzgerald Jennifer Shilling
Party Republican Democratic
Leader's seat 13th– Juneau 32nd– La Crosse
Last election 9 seats, 48.6% 7 seats, 50.3%
Seats before 18 15
Seats won 11 6
Seats after 19 14
Seat change Increase 1 Decrease 1
Popular vote 675,016 605,142
Percentage 52.3% 46.9%
Seats up 10 7
Results of the elections:
     Republican hold      Republican gain
     Democratic hold
     No election
President before election

Roger Roth
Republican

Elected President

Roger Roth
Republican

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The 2018 Wisconsin Senate elections were held on Tuesday, November 6, 2018, at the Fall general election in Wisconsin. Seventeen of the 33 seats in the Wisconsin Senate were up for election—the odd-numbered districts. Before the election, Republicans held 18 seats and Democrats held 15 seats. Of the seats up for election, 10 were held by Republicans and 7 were held by Democrats. The primary election was held on August 14, 2018.

Republicans maintained control of the Senate, flipping one Democratic-held seat to enter the 104th Wisconsin Legislature with 19 of 33 Senate seats. [1]

Results summary

Statewide results of the 2018 Wisconsin State Senate election: [2]

Seats Party
(majority caucus shading)
 Total
Democratic Republican
Last election (2016) 7 9 16
Total after last election (2016) 13 20 33
Total before this election 15 18 33
Up for election 7 10 17
of which: Incumbent retiring 1 0 1
Vacated 0 0 0
Unopposed 1 1 2
This election 6 11 17
Change from last election Decrease 1 Increase 1
Total after this election 14 19 33
Change in total Decrease 1 Increase 1
Party Candi-
dates		 Votes Seats
No. % No. +/– %
Republican Party 15 675,016 52.31% 11 Increase 1 64.71%
Democratic Party 15 605,142 46.90% 6 Decrease 1 35.29%
Independent 1 1,776 0.14% 0 Steady 0.00%
Write-in 2 57 0.00% 0 Steady 0.00%
Scattering 8,346 0.65% 0 Steady 0.00%
Total 33 1,290,337 100.00% 17 Steady 100.00%
Popular vote
Republican
 
 52.31%
Democratic
 
 46.90%
Other
 
 0.79%
House seats
Republican
 
 64.71%
Democratic
 
 35.29%

Close races

Seats where the margin of victory was under 10%:

  1. State Senate district 25, 2.14%
  2. State Senate district 5, 2.4%
  3. State Senate district 31, 5.66%
  4. State Senate district 19, 6.5%
  5. State Senate district 17, 8.24%
  6. State Senate district 1, 9.08% (gain)

Special elections

Two special elections were held during 2018 for vacancies in the state Senate. Democrats won both special elections, for a net gain of two seats.

Dist. Previous Incumbent This Election
Senator Party First
elected 		Candidate(s) Result
01 Frank Lasee Rep. 2010
Incumbent resigned on Dec. 29, 2017.
New member elected Jun. 12, 2018.
Democratic gain. [3]
10 Sheila Harsdorf Rep. 2000
Incumbent resigned on Nov. 10, 2017.
New member elected Jan. 16, 2018.
Democratic gain. [4]

Outgoing incumbents

Retiring

Seeking other office

Candidates and results

Results of the 2018 Wisconsin State Senate election by district: [2]

District Democratic Republican Others Total Result [a]
Votes % Votes % Votes % Votes
District 1 39,414 45.42% 47,289 54.50% 65 0.07% 86,768 Republican Gain
District 3 36,875 97.40% - - 985 2.60% 37,860 Democratic Hold
District 5 45,591 48.75% 47,836 51.15% 102 0.11% 93,529 Republican Hold
District 7 56,198 66.25% 28,459 33.55% 165 0.19% 84,822 Democratic Hold
District 9 31,684 41.47% 44,680 58.47% 45 0.06% 76,409 Republican Hold
District 11 - - 59,512 95.89% 2,554 4.11% 62,066 Republican Hold
District 13 34,385 40.90% 49,668 59.07% 24 0.03% 84,077 Republican Hold
District 15 54,381 96.53% - - 1,952 3.47% 56,333 Democratic Hold
District 17 31,757 45.86% 37,465 54.10% 26 0.04% 69,248 Republican Hold
District 19 38,179 46.73% 43,493 53.23% 29 0.04% 81,701 Republican Hold
District 21 35,111 41.91% 48,603 58.01% 69 0.08% 83,783 Republican Hold
District 23 29,637 40.82% 42,958 59.17% 11 0.02% 72,606 Republican Hold
District 25 39,624 51.06% 37,960 48.92% 20 0.03% 77,604 Democratic Hold
District 27 64,606 66.16% 32,993 33.79% 54 0.06% 97,653 Democratic Hold
District 29 27,627 35.73% 49,657 64.22% 41 0.05% 77,325 Republican Hold
District 31 40,073 51.67% 35,684 46.01% 1,804 2.33% 77,561 Democratic Hold
District 33 - - 68,759 96.85% 2,233 3.15% 70,992 Republican Hold
Total 605,142 46.90% 675,016 52.31% 10,179 0.79% 1,290,337

See also

Notes

  1. ^ Compared to the 2014 election.

References

  1. ^ Marley, Patrick; Beck, Molly (November 7, 2018). "Despite losses in statewide races, GOP strengthens hold on Wisconsin Senate". Milwaukee Journal Sentinel. Milwaukee. Retrieved December 6, 2018.
  2. ^ a b "Summary Results - 2018 General Election" (PDF). Madison: Wisconsin Elections Commission. pp. 6–10. Retrieved December 3, 2018.
  3. ^ Canvass Results for 2018 Special Election State Senate District 1 - 6/12/2018 (PDF) (Report). Wisconsin Elections Commission. June 20, 2018. Retrieved April 16, 2024.
  4. ^ Canvass Results for 2018 Special Election State Senate District 10 - 1/16/2018 (PDF) (Report). Wisconsin Elections Commission. January 25, 2018. Retrieved April 16, 2024.
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