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Montana, U.S. Senate

U.S. Sen. Jon Tester (D) defeated Montana State Auditor Matt Rosendale (R) and land surveyor Rick Breckenridge (L) in the general election on November 6, 2018, to represent Montana in the United States Senate.

Thirty-five of the 100 seats in the United States Senate were up for election in 2018, including two seats up for special election. Republicans gained four previously Democratic-held seats and Democrats gained two previously Republican-held seats, resulting in a net gain of two seats for the Republican Party and a 53-seat majority in the chamber. This race was identified as a 2018 battleground that might have affected partisan control of the chamber in the 116th Congress. At the time of the election, Republicans held a 51-seat Senate majority. Democrats held 47 seats, and the two independents caucused with them. Democrats faced greater partisan risk in 2018, as they were defending 26 seats while Republicans were only defending nine. Democrats had to defend seats in 10 states Donald Trump (R) won. The GOP defended one Senate seat in a state Hillary Clinton (D) won.

Trump won Montana by 20 percentage points in the 2016 presidential election. That same year, incumbent Gov. Steve Bullock (D) won re-election by 3.8 percentage points. The last U.S. Senate election was in 2014 when U.S. Rep. Steve Daines (R) defeated Amanda Curtis (D) by 18 percentage points. Tester was first elected in 2006. In his 2012 re-election, the Libertarian candidate received 6.6 percent of the vote, nearly double the 3.7 percentage point margin separating Tester and Republican Denny Rehberg.

Polls

United States Senate election in Montana, 2018

Poll Poll sponsor Jon Tester (D) Matt Rosendale (R)Other/UndecidedMargin of errorSample size
University of Montana, Big Sky
(October 10-18, 2018)
N/A 49%39%12%+/-4.33533
Montana State University, Billings
(October 8-13, 2018)
N/A 47%38%15%+/-4.5471
Public Policy Polling
(September 28, 2018)
Protect Our Care 49%45%6%+/-4.0594
Axis Research
(September 17-19, 2018)
National Republican Senatorial Committee 44%44%12%+/-4.5480
Beneson Strategy Group
(September 6-16, 2018)
AARP 50%43%7%+/-3.0950
YouGov
(September 10- 14, 2018)
CBS News 47%45%8%+/-5.2543
WPA Intelligence
(August 20- 22, 2018)
National Republican Senatorial Committee 45%47%8%+/-4.0600
Remington Research
(July 8 - 10, 2018)
N/A 49%46%5%+/-2.02,581
AVERAGES 47.5% 43.38% 9.13% +/-3.94 844

Campaign finance

The chart below contains data from financial reports submitted to the Federal Election Commission.

Name Party Receipts* Disbursements** Cash on hand Date
Jon Tester Democratic Party $18,686,615 $19,757,020 $480,574 As of December 31, 2018
Matt Rosendale Republican Party $5,994,023 $5,924,058 $76,178 As of December 31, 2018
Rick Breckenridge Libertarian Party $0 $0 $0 Data not available

Source: Federal Elections Commission, "Campaign finance data," 2018.

* According to the FEC, "Receipts are anything of value (money, goods, services or property) received by a political committee."
** According to the FEC, a disbursement "is a purchase, payment, distribution, loan, advance, deposit or gift of money or anything of value to influence a federal election," plus other kinds of payments not made to influence a federal election.

Election history

2014

U.S. Senate, Montana General Election, 2014

Party Candidate Vote % Votes
Republican Green check mark transparent.pngSteve Daines 57.8% 213,709
Democratic Amanda Curtis 40.1% 148,184
Libertarian Roger Roots 2.1% 7,933
Total Votes 369,826
Source: Montana Secretary of State

2012

U.S. Senate, Montana General Election, 2012

Party Candidate Vote % Votes
Democratic Green check mark transparent.pngJon Tester Incumbent 48.6% 236,123
Republican Denny Rehberg 44.9% 218,051
Libertarian Dan Cox 6.6% 31,892
Total Votes 486,066

Demographics

Demographic data for Montana

MontanaU.S.
Total population:1,032,073316,515,021
Land area (sq mi):145,5463,531,905
Gender
Female:49.7%50.8%
Race and ethnicity**
White:89.2%73.6%
Black/African American:0.5%12.6%
Asian:0.7%5.1%
Native American:6.5%0.8%
Pacific Islander:0.1%0.2%
Two or more:2.5%3%
Hispanic/Latino:3.3%17.1%
Education
High school graduation rate:92.8%86.7%
College graduation rate:29.5%29.8%
Income
Median household income:$47,169$53,889
Persons below poverty level:17%11.3%
Source: U.S. Census Bureau, "American Community Survey" (5-year estimates 2010-2015)
for more information on the 2020 census and here for more on its impact on the redistricting process in Montana.

As of July 2016, Montana's three largest cities were Billings (pop. est. 109,642), Missoula (pop. est. 73,340), and Great Falls (pop. est. 58,876).