Tammy Nichols

Tammy Nichols: Republican incumbent for Idaho Senate District 10

Tammy Nichols is the Republican incumbent for Idaho Senate District 10 on the November 3, 2026 general election ballot. She won the May 19, 2026 primary unopposed, receiving 7,756 votes. In the general election she faces Democrat Nancy M. Parker. Nichols is in her second Senate term. District 10 covers part of the Boise metro area in Canyon County.

Some older reporting lists Nichols in District 11. That predates redistricting. Her current district is District 10, which is the number on the Idaho Legislature's own Senate roster.

Background

Nichols served two terms in the Idaho House before moving to the Senate. Her House service ran from 2018 through 2022. She then won her first Senate term and is now serving her second, according to the Legislature's membership records.

Her own campaign site describes her as a 7th-generation Idahoan and uses the word "peopletician" to describe her approach to public office. The site is her own description of herself, so voters can weigh it accordingly. The same site names three endorsers: Rep. Russ Fulcher, former Idaho Attorney General Raul Labrador, and activist Greg Pruett, who runs the Idaho Second Amendment Alliance.

Her Idaho GOP candidate questionnaire lists her stated campaign priorities in her own words. Those answers come directly from her, not from third-party summaries.

In the Legislature

Nichols is a current leader of the Idaho Freedom Caucus, an in-chamber caucus of legislators. She runs it alongside Sen. Heather Scott of District 2 and Sen. Brian Lenney of District 13, according to the caucus's documented membership. The caucus is separate from the Idaho Freedom Foundation, which is a policy organization that scores legislators rather than a chamber caucus. The two groups share a name but are different organizations with different roles.

The Idaho Freedom Foundation publishes an annual Freedom Index that measures how often a legislator votes the way the Foundation prefers. Nichols scored 85.8% on the 2026 Freedom Index, a "B" grade. Her 2026 Spending Index score is 90.6%. These numbers describe one group's rating of her voting record. They are not an independent evaluation, and voters who disagree with the Foundation's policy preferences may read the same votes differently.

Sources

• Idaho State Legislature, official Senate membership roster, the controlling record for her district and term
• IdahoExtremism.org, Idaho Freedom Caucus page documenting the caucus's current leadership of Sens. Scott, Nichols, and Lenney
• Idaho Freedom Foundation, 2026 Freedom Index and Spending Index scores for Senate District 10
• Nichols for Idaho campaign site, her self-description and her list of three named endorsers
• Idaho Republican Party candidate questionnaire, her stated top campaign issues in her own words