2018 Idaho Senate election

2018 Idaho Senate election

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All 35 seats in the Idaho Senate 18 seats needed for a majority
Majority party Minority party   Leader Chuck Winder Michelle Stennett Party Republican Democratic Leader since September 21, 2017 December 1, 2012 Leader's seat District 20 District 26 Last election 29 6 Seats after 28 7 Seat change 1 1 Popular vote 377,542 169,426 Percentage 68.10% 30.56%
Majority Leader before election Chuck Winder Republican Elected Majority Leader Chuck Winder Republican

The 2018 Idaho Senate election was held on November 6, 2018, to determine which party would control the Idaho Senate for the following two years in the 65th Idaho Legislature. All 35 seats in the Idaho Senate were up for election and the primary was held on May 15, 2018. Prior to the election, 29 seats were held by Republicans and 6 seats were held by Democrats. The general election saw Democrats flip a single seat, thereby meaning that Republicans retained their majority in the State Senate. ^{[1] [2]}

Predictions

Source	Ranking	As of
Governing [3]	Safe R	October 8, 2018

Retirements

Republicans

1. District 1: Shawn Keough retired.
2. District 3: Bob Nonini retired.
3. District 14: Marv Hagedorn retired.
4. District 35: Jeff Siddoway retired.

Incumbents defeated

In primary

Republicans

1. District 33: Tony Potts lost renomination to Dave Lent.

In general

Republicans

1. District 5: Dan Foreman lost re-election to David Nelson.

Closest races

Seats where the margin of victory was under 10%:

1. District 15, 0.04%

Results

District 1

District 1 election, 2018

Party		Candidate	Votes	%
	Republican	Jim Woodward	14,831	74.32%
	Democratic	Vera Gadman	5,125	25.68%
Total votes			19,956	100.0%
	Republican hold

District 2

District 2 election, 2018

Party		Candidate	Votes	%
	Republican	Steve Vick (incumbent)	15,109	72.88%
	Democratic	Dale Broadsword	5,131	24.75%
	Libertarian	Shon Luoma	491	2.37%
Total votes			20,731	100.0%
	Republican hold

District 3

District 3 election, 2018

Party		Candidate	Votes	%
	Republican	Don Cheatham	12,226	72.20%
	Democratic	Patrick Lippert	4,707	27.80%
Total votes			16,933	100.0%
	Republican hold

District 4

District 4 election, 2018

Party		Candidate	Votes	%
	Republican	Mary Souza (incumbent)	10,579	57.72%
	Democratic	Cory Jane English	7,749	42.28%
Total votes			18,328	100.0%
	Republican hold

District 5

District 5 election, 2018

Party		Candidate	Votes	%
	Democratic	David Nelson	11,197	56.06%
	Republican	Dan Foreman (incumbent)	8,777	43.94%
Total votes			19,974	100.0%
	Democratic gain from Republican

District 6

District 6 election, 2018

Party		Candidate	Votes	%
	Republican	Dan G. Johnson (incumbent)	13,353	100.0%
Total votes			13,353	100.0%
	Republican hold

District 7

District 7 election, 2018

Party		Candidate	Votes	%
	Republican	Carl Crabtree (incumbent)	13,936	100.0%
Total votes			13,936	100.0%
	Republican hold

District 8

District 8 election, 2018

Party		Candidate	Votes	%
	Republican	Steven Thayn (incumbent)	14,128	70.98%
	Independent	Bill Sifford	4,510	22.66%
	Constitution	Kirsten Faith Richardson	1,265	6.36%
Total votes			19,903	100.0%
	Republican hold

District 9

District 9 election, 2018

Party		Candidate	Votes	%
	Republican	Abby Lee (incumbent)	13,849	100.0%
Total votes			13,849	100.0%
	Republican hold

District 10

District 10 election, 2018

Party		Candidate	Votes	%
	Republican	Jim Rice (incumbent)	7,526	61.46%
	Democratic	Evangeline Beechler	4,720	38.54%
Total votes			12,246	100.0%
	Republican hold

District 11

District 11 election, 2018

Party		Candidate	Votes	%
	Republican	Patti Anne Lodge (incumbent)	13,834	77.79%
	Democratic	Edward Savala	3,949	22.21%
Total votes			17,783	100.0%
	Republican hold

District 12

District 12 election, 2018

Party		Candidate	Votes	%
	Republican	Todd Lakey (incumbent)	9,089	65.09%
	Democratic	Chelle Gluch	4,875	34.91%
Total votes			13,964	100.0%
	Republican hold

District 13

District 13 election, 2018

Party		Candidate	Votes	%
	Republican	Jeff Agenbroad (incumbent)	12,550	100.0%
Total votes			12,550	100.0%
	Republican hold

District 14

District 14 election, 2018

Party		Candidate	Votes	%
	Republican	C. Scott Grow	18,893	69.56%
	Democratic	Richard Boozel	8,268	30.44%
Total votes			27,161	100.0%
	Republican hold

District 15

District 15 election, 2018

Party		Candidate	Votes	%
	Republican	Fred S. Martin (incumbent)	8,948	50.02%
	Democratic	Jim Bratnober	8,942	49.98%
Total votes			17,890	100.0%
	Republican hold

District 16

District 16 election, 2018

Party		Candidate	Votes	%
	Democratic	Grant Burgoyne (incumbent)	12,784	65.21%
	Republican	LeeJoe Lay	6,819	34.79%
Total votes			19,603	100.0%
	Democratic hold

District 17

District 17 election, 2018

Party		Candidate	Votes	%
	Democratic	Maryanne Jordan (incumbent)	11,652	69.68%
	Republican	David DeHaas	5,069	30.32%
Total votes			16,721	100.0%
	Democratic hold

District 18

District 18 election, 2018

Party		Candidate	Votes	%
	Democratic	Janie Ward-Engelking (incumbent)	17,090	100.0%
Total votes			17,090	100.0%
	Democratic hold

District 19

District 19 election, 2018

Party		Candidate	Votes	%
	Democratic	Cherie Buckner-Webb (incumbent)	18,793	74.59%
	Republican	Aaron Tribble	6,401	25.41%
Total votes			25,194	100.0%
	Democratic hold

District 20

District 20 election, 2018

Party		Candidate	Votes	%
	Republican	Chuck Winder (incumbent)	14,535	100.0%
Total votes			14,535	100.0%
	Republican hold

District 21

District 21 election, 2018

Party		Candidate	Votes	%
	Republican	Clifford Bayer (incumbent)	12,275	57.80%
	Democratic	Dawn Pierce	7,776	36.61%
	Libertarian	Joe Evans	1,187	5.59%
Total votes			21,238	100.0%
	Republican hold

District 22

District 22 election, 2018

Party		Candidate	Votes	%
	Republican	Lori Den Hartog (incumbent)	10,709	69.36%
	Democratic	Mik Lose	4,731	30.64%
Total votes			15,440	100.0%
	Republican hold

District 23

District 23 election, 2018

Party		Candidate	Votes	%
	Republican	Bert Brackett (incumbent)	10,492	100.0%
Total votes			10,492	100.0%
	Republican hold

District 24

District 24 election, 2018

Party		Candidate	Votes	%
	Republican	Lee Heider (incumbent)	10,547	100.0%
Total votes			10,547	100.0%
	Republican hold

District 25

District 25 election, 2018

Party		Candidate	Votes	%
	Republican	James Patrick (incumbent)	11,969	100.0%
Total votes			11,969	100.0%
	Republican hold

District 26

District 26 election, 2018

Party		Candidate	Votes	%
	Democratic	Michelle Stennett (incumbent)	10,094	59.86%
	Republican	Julie Lynn	6,768	40.14%
Total votes			16,862	100.0%
	Democratic hold

District 27

District 27 election, 2018

Party		Candidate	Votes	%
	Republican	Kelly Anthon (incumbent)	10,291	100.0%
Total votes			10,291	100.0%
	Republican hold

District 28

District 28 election, 2018

Party		Candidate	Votes	%
	Republican	Jim Guthrie (incumbent)	10,174	61.88%
	Democratic	Mike Saville	6,268	38.12%
Total votes			16,442	100.0%
	Republican hold

District 29

District 29 election, 2018

Party		Candidate	Votes	%
	Democratic	Mark Nye (incumbent)	8,338	57.85%
	Republican	Lance B. Kolbet	6,074	42.15%
Total votes			14,412	100.0%
	Democratic hold

District 30

District 30 election, 2018

Party		Candidate	Votes	%
	Republican	Dean Mortimer (incumbent)	12,838	100.0%
Total votes			12,838	100.0%
	Republican hold

District 31

District 31 election, 2018

Party		Candidate	Votes	%
	Republican	Steve Bair (incumbent)	11,084	100.0%
Total votes			11,084	100.0%
	Republican hold

District 32

District 32 election, 2018

Party		Candidate	Votes	%
	Republican	Mark Harris (incumbent)	13,347	100.0%
Total votes			13,347	100.0%
	Republican hold

District 33

District 33 election, 2018

Party		Candidate	Votes	%
	Republican	Dave Lent	7,899	59.49%
	Democratic	Jerry Sehlke	5,379	40.51%
Total votes			13,278	100.0%
	Republican hold

District 34

District 34 election, 2018

Party		Candidate	Votes	%
	Republican	Brent Hill (incumbent)	9,500	83.64%
	Democratic	Robert Nielsen	1,858	16.36%
Total votes			11,358	100.0%
	Republican hold

District 35

District 35 election, 2018

Party		Candidate	Votes	%
	Republican	Van Burtenshaw	13,123	100.0%
Total votes			13,123	100.0%
	Republican hold

References

1. "Idaho State Senate elections, 2018". ballotpedia.org. Retrieved December 15, 2025.
2. "Legislative Totals". sos.idaho.gov. Retrieved December 15, 2025.
3. Jacobson, Louis (October 8, 2018). "A Month Before Election Day, Democrats Poised for Legislative Gains". Governing. Retrieved December 15, 2025.