2018 United States House of Representatives election in Montana

The 2018 United States House of Representatives election in Montana was held on November 6, 2018, to elect the U.S. representative from Montana's at-large congressional district. The election coincided with other elections to the House of Representatives, elections to the United States Senate, and various state and local elections.

2018 United States House of Representatives election in Montana

← 2017 (special) November 6, 2018 (2018-11-06) 2020 →

Nominee Greg Gianforte Kathleen Williams Party Republican Democratic Popular vote 256,661 233,284 Percentage 50.9% 46.3%

County results Gianforte:      50–60%      60–70%      70–80%      80–90% Williams:      40–50%      50–60%      60–70%      70–80%

U.S. Representative before election Greg Gianforte Republican Elected U.S. Representative Greg Gianforte Republican

Republican primary

Candidates

Declared

• Greg Gianforte, incumbent U.S. Representative^[1]

Primary results

2018 Republican Party primary results by county:

  Gianforte—100%

  Gianforte—>90%

Republican primary results

Party		Candidate	Votes	%
	Republican	Greg Gianforte (incumbent)	135,225	100
Total votes			135,225	100

Democratic primary

Candidates

Declared

• John Heenan, attorney^[2]
• Grant Kier, former executive director of the Five Valleys Land Trust^[3]
• Jared Pettinato, attorney^[4]
• Kathleen Williams, former state representative^[5]

Withdrew

• Lynda Moss, former state senator (but remained on the ballot)^[6][7]

Primary results

Democratic Party primary results by county:

  Williams—50–60%

  Williams—40–50%

  Williams—<40%

  Heenan—<40%

  Heenan—40–50%

  Heenan—50–60%

  Kier—<40%

  Kier—40–50%

Democratic primary results^[8]

Party		Candidate	Votes	%
	Democratic	Kathleen Williams	37,158	33.5
	Democratic	John Heenan	35,163	31.7
	Democratic	Grant Kier	26,835	24.2
	Democratic	Lynda Moss (withdrawn)	5,592	5.0
	Democratic	John Meyer	3,695	3.3
	Democratic	Jared Pettinato	2,440	2.2
Total votes			110,883	100

Libertarian primary

Candidates

Declared

• Elinor Swanson, attorney^[9]

General election

Debates

• Complete video of debate, September 29, 2018
• Complete video of debate, October 6, 2018

Predictions

Source	Ranking	As of
The Cook Political Report[10]	Lean R	November 5, 2018
Inside Elections/Rothenberg Political Report[11]	Likely R	November 5, 2018
Sabato's Crystal Ball[12]	Lean R	November 5, 2018

Endorsements

Greg Gianforte (R)

Federal politicians

• Donald Trump, 45th President of the United States

Organizations

• Montana Shooting Sports Association^[13]
• NRA Political Victory Fund^[14]

Kathleen Williams (D)

Federal politicians

• Jon Tester, U.S. Senator (D-MT)^[15]

Newspapers

• Billings Gazette^[16]
• Bozeman Daily Chronicle^[17]
• Missoulian^[18]

Labor unions

• American Federation of Government Employees District 11^[19]
• Montana AFL-CIO^[20]
• Montana Sportsmen Alliance^[21]
• Montana State Council of Professional Fire Fighters^[22]

Organizations

• EMILY's List^[23]
• End Citizens United^[24]
• Giffords PAC^[25]
• League of Conservation Voters Action Fund^[26]
• Montana Conservation Voters^[27]
• National Committee to Preserve Social Security and Medicare^[28]
• National Organization for Women PAC^[29]
• Planned Parenthood Action Fund^[30]

Polling

Poll source	Date(s) administered	Sample size	Margin of error	Greg Gianforte (R)	Kathleen Williams (D)	Elinor Swanson (L)	Other	Undecided
Change Research (D)[31]	November 2–4, 2018	879	–	52%	44%	2%	–	–
Gravis Marketing[32]	October 24–26, 2018	782	± 3.5%	48%	48%	–	–	3%
University of Montana[33]	October 10–18, 2018	533	± 4.3%	45%	46%	2%	–	7%
Montana State University Billings[34]	October 8–13, 2018	471	± 4.5%	44%	41%	3%	–	12%
Montana State University Bozeman[35]	September 15 – October 6, 2018	2,079	± 2.2%	48%	40%	2%	1%	9%
Gravis Marketing[36]	September 19–22, 2018	710	± 3.7%	51%	42%	–	–	8%
AARP/Benenson Strategy Group (D)[37]	September 6–16, 2018	950	± 3.1%	46%	45%	–	1%	7%
University of Montana[38]	August 13–31, 2018	466	± 4.5%	38%	51%	3%	–	8%
Gravis Marketing[39]	June 11–13, 2018	469	± 4.5%	43%	49%	–	–	8%

Results

Gianforte defeated Kathleen Williams on November 6, 2018.^[40]

Montana's at-large congressional district, 2018^[41]

Party		Candidate	Votes	%	±%
	Republican	Greg Gianforte (incumbent)	256,661	50.88%	+0.93%
	Democratic	Kathleen Williams	233,284	46.25%	+1.88%
	Libertarian	Elinor Swanson	14,476	2.87%	−2.81%
Total votes			504,421	100.00%	N/A
	Republican hold

See also

• 2018 United States House of Representatives elections