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Democratic Party primaries in Idaho, 2026
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← 2024
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| Democratic Party primaries, 2026 |
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| Primary Date |
| May 19, 2026 |
| Federal elections |
| Democratic primaries for U.S. House |
| State party |
| Democratic Party of Idaho |
| State political party revenue |
This page focuses on the Democratic primaries that will take place in Idaho on May 19, 2026.
A primary election is an election in which registered voters select a candidate that they believe should be a political party's candidate for elected office to run in the general election. They are also used to choose convention delegates and party leaders. Primaries are state-level and local-level elections that take place prior to a general election. In Idaho, parties decide who may vote in their primaries.[1] As of October 2025, the Democratic Party allows unaffiliated voters to vote in its primary, while the Republican Party only allows voters registered with its party to vote in its primary. Unaffiliated voters can choose to affiliate with a party on Election Day.[2][3]
For information about which offices are nominated via primary election, see this article.
Federal elections
U.S. House
Voting information
- See also: Voting in Idaho
Context of the 2026 elections
Idaho Party Control: 1992-2025
No Democratic trifectas • Thirty one years of Republican trifectas
Scroll left and right on the table below to view more years.
| Year | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Governor | D | D | D | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R |
| Senate | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R |
| House | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R | R |
State party overview
Democratic Party of Idaho
- See also: Democratic Party of Idaho
State political party revenue
State political parties typically deposit revenue in separate state and federal accounts in order to comply with state and federal campaign finance laws.
The Democratic Party and the Republican Party maintain state affiliates in all 50 states, the District of Columbia, and select U.S. territories. The following map displays total state political party revenue per capita for the Democratic state party affiliates.
Pivot Counties
- See also: Pivot Counties by state
No counties in Idaho are Pivot Counties. Pivot Counties are counties that voted for Barack Obama (D) in 2008 and 2012 and for Donald Trump (R) in 2016. Altogether, the nation had 206 Pivot Counties, with most being concentrated in upper midwestern and northeastern states.
In the 2016 presidential election, Donald Trump (R) won Idaho with 59.3 percent of the vote. Hillary Clinton (D) received 27.5 percent. Independent candidate Evan McMullin received 6.7 percent. In presidential elections between 1900 and 2016, Idaho voted Republican 70 percent of the time and Democratic 30 percent of the time. In the five presidential elections between 2000 and 2016, Idaho voted Republican all five times.
Presidential results by legislative district
The following table details results of the 2012 and 2016 presidential elections by state House districts in Idaho. Click [show] to expand the table. The "Obama," "Romney," "Clinton," and "Trump" columns describe the percent of the vote each presidential candidate received in the district. The "2012 Margin" and "2016 Margin" columns describe the margin of victory between the two presidential candidates in those years. Data on the results of the 2012 and 2016 presidential elections broken down by state legislative districts was compiled by Daily Kos.[4][5]
| In 2012, Barack Obama (D) won 4 out of 35 state House districts in Idaho with an average margin of victory of 13.5 points. In 2016, Hillary Clinton (D) won 4 out of 35 state House districts in Idaho with an average margin of victory of 17 points. |
| In 2012, Mitt Romney (R) won 31 out of 35 state House districts in Idaho with an average margin of victory of 38.6 points. In 2016, Donald Trump (R) won 31 out of 35 state House districts in Idaho with an average margin of victory of 39 points. Trump won three seats controlled by Democrats heading into the 2018 elections. |
| 2016 presidential results by state House district | |||||||
|---|---|---|---|---|---|---|---|
| District | Obama | Romney | 2012 Margin | Clinton | Trump | 2016 Margin | |
| 1 | 33.87% | 62.34% | R+28.5 | 26.01% | 65.46% | R+39.5 | |
| 2 | 26.93% | 70.62% | R+43.7 | 20.64% | 71.95% | R+51.3 | |
| 3 | 29.14% | 68.14% | R+39 | 21.06% | 70.57% | R+49.5 | |
| 4 | 39.16% | 57.97% | R+18.8 | 32.30% | 58.13% | R+25.8 | |
| 5 | 45.88% | 49.34% | R+3.5 | 39.67% | 46.41% | R+6.7 | |
| 6 | 37.09% | 60.34% | R+23.3 | 27.14% | 63.35% | R+36.2 | |
| 7 | 30.10% | 66.90% | R+36.8 | 19.98% | 72.55% | R+52.6 | |
| 8 | 29.55% | 67.36% | R+37.8 | 21.50% | 69.20% | R+47.7 | |
| 9 | 25.68% | 71.70% | R+46 | 17.21% | 74.09% | R+56.9 | |
| 10 | 38.47% | 58.37% | R+19.9 | 29.81% | 58.12% | R+28.3 | |
| 11 | 23.55% | 73.82% | R+50.3 | 17.04% | 72.09% | R+55.1 | |
| 12 | 31.70% | 65.46% | R+33.8 | 24.33% | 62.75% | R+38.4 | |
| 13 | 30.45% | 66.85% | R+36.4 | 25.08% | 62.48% | R+37.4 | |
| 14 | 28.40% | 69.37% | R+41 | 25.20% | 62.69% | R+37.5 | |
| 15 | 40.27% | 56.38% | R+16.1 | 36.12% | 49.48% | R+13.4 | |
| 16 | 51.36% | 45.03% | D+6.3 | 47.20% | 39.26% | D+7.9 | |
| 17 | 54.87% | 40.25% | D+14.6 | 48.92% | 35.61% | D+13.3 | |
| 18 | 50.74% | 45.74% | D+5 | 49.32% | 37.45% | D+11.9 | |
| 19 | 62.17% | 34.02% | D+28.2 | 61.76% | 27.06% | D+34.7 | |
| 20 | 31.96% | 65.66% | R+33.7 | 27.79% | 57.58% | R+29.8 | |
| 21 | 33.56% | 63.72% | R+30.2 | 29.26% | 57.07% | R+27.8 | |
| 22 | 28.40% | 68.66% | R+40.3 | 21.33% | 65.07% | R+43.7 | |
| 23 | 27.41% | 69.63% | R+42.2 | 18.40% | 72.24% | R+53.8 | |
| 24 | 30.28% | 66.54% | R+36.3 | 24.58% | 61.74% | R+37.2 | |
| 25 | 23.52% | 73.82% | R+50.3 | 17.71% | 70.40% | R+52.7 | |
| 26 | 45.05% | 52.29% | R+7.2 | 42.82% | 47.54% | R+4.7 | |
| 27 | 16.19% | 81.96% | R+65.8 | 14.64% | 72.01% | R+57.4 | |
| 28 | 31.76% | 66.06% | R+34.3 | 25.38% | 57.30% | R+31.9 | |
| 29 | 43.30% | 53.10% | R+9.8 | 36.52% | 46.08% | R+9.6 | |
| 30 | 19.06% | 78.92% | R+59.9 | 17.63% | 62.15% | R+44.5 | |
| 31 | 21.71% | 76.35% | R+54.6 | 17.59% | 65.61% | R+48 | |
| 32 | 17.05% | 81.10% | R+64.1 | 17.13% | 65.98% | R+48.9 | |
| 33 | 30.56% | 66.37% | R+35.8 | 26.72% | 54.03% | R+27.3 | |
| 34 | 6.92% | 92.00% | R+85.1 | 8.01% | 59.90% | R+51.9 | |
| 35 | 12.96% | 85.32% | R+72.4 | 9.79% | 72.97% | R+63.2 | |
| Total | 32.62% | 64.53% | R+31.9 | 27.49% | 59.26% | R+31.8 | |
| Source: Daily Kos | |||||||
See also
2026 Elections
External links
Footnotes
- ↑ Idaho State Legislature, "Idaho Code § 34–904A," accessed September 3, 2025
- ↑ Idaho Secretary of State's Office, "Primary Elections in Idaho," accessed October 20, 2025
- ↑ ACLU Idaho, "2024 Your Rights as an Idaho Voter," accessed October 20, 2025
- ↑ Daily Kos, "Daily Kos Elections' statewide election results by congressional and legislative districts," July 9, 2013
- ↑ Daily Kos, "Daily Kos Elections' 2016 presidential results for congressional and legislative districts," February 6, 2017
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