Mark Lamb (R) – AZ-05 House 2026

About

Mark Lamb is a Republican former Pinal County sheriff, serving from 2017 to 2024, and the GOP nominee for Arizona's 5th Congressional District. He won the July 21, 2026 primary with President Donald Trump's endorsement, defeating Daniel Keenan, after an unsuccessful run for the U.S. Senate in 2024. He campaigns as a "constitutional sheriff" and America First conservative emphasizing border security, immigration enforcement, lower costs, and constitutional rights.

Biography sources 9

Positions on Key Issues

Positions of Mark Lamb on key issues
Issue	Stance	Sources
Healthcare	Lamb's campaign has emphasized health freedom, individual liberty, informed consent, and parental rights by highlighting its endorsement from Stand for Health Freedom. In the campaign's quoted statement, Lamb said Americans deserve leaders who defend constitutional rights, respect individual freedom, and oppose government overreach; the campaign page does not specify a broader healthcare-reform plan.	Stand for Health Freedom Endorses Mark Lamb for Congress
Economy	Lamb says he would seek to lower costs, support small businesses, protect taxpayers, and strengthen American jobs. In a campaign event, he linked inflation and consumer costs to federal overspending, energy policy, and regulations, and advocated expanding domestic energy production, reducing regulations affecting mining, agriculture, and manufacturing, and addressing federal debt and spending.	Mark Lamb for Congress issues page Mark Lamb Speaks to Chandler Republicans About Securing America's Future
Climate/Energy	Lamb has emphasized American energy independence and expanding domestic energy production, while favoring reduced regulation and opposing climate-policy approaches such as Green New Deal-style measures. Available campaign materials do not identify aggressive emissions-reduction targets as a priority.	With Kari Lake out of debate, can Mark Lamb make impression? Mark Lamb: 2026 Arizona U.S. House Polls & Odds
Abortion & Reproductive Health	Mark Lamb opposes abortion and identifies as pro-life. A 2026 Arizona 5th Congressional District candidate profile reports that he says life begins at conception, praised the Supreme Court’s Dobbs decision, favors allowing states to determine abortion policy, criticized an Arizona ballot measure he said would permit abortion late in pregnancy, and supports measures protecting unborn children.	Mark Lamb: 2026 Arizona U.S. House Polls & Odds
Immigration	Lamb says he would secure the border, stop cartels, enforce immigration law, and protect legal immigration and commerce. His campaign also frames immigration as a system that should restore order and says his law-enforcement experience included confronting cartels and human trafficking.	Mark Lamb for Congress — Issues Mark Lamb on Newsmax: Put Americans First on Immigration
Firearms & Second Amendment	Lamb's campaign says he will protect the Second Amendment as part of his congressional priorities. His campaign also promoted a commemorative rifle giveaway and described its broader agenda as supporting constitutional rights and individual liberty; the campaign page does not specify particular firearms legislation or proposed restrictions.	Mark Lamb on The Steve Gruber Show: Common Sense Leadership, Election Integrity & Arizona's Future Mark Lamb America 250 Rifle Giveaway
Foreign Policy	Lamb has not issued a detailed foreign-policy platform, but commentary from AIPAC and The Hill on his candidacy describes him as favoring "zero" foreign aid and opposing U.S. aid to Israel. His campaign emphasizes America First priorities and treats border security and cartel enforcement as national-security issues.	AIPAC congratulates pro-Israel candidates victorious in primaries A major pro-Israel group is zeroing in on one of their last contests - The Hill Mark Lamb for Congress - Issues
Civil Rights & Equality	Lamb's campaign says constitutional protections, privacy rights, and due process should remain central to public policy, while government should avoid unnecessary overreach. The campaign materials reviewed do not state a specific position on the Equal Rights Amendment or federal protections against discrimination based on race, sex, sexual orientation, or gender identity.	Mark Lamb Outlines Vision for Congress at United Patriots AZ Event in Gilbert Mark Lamb for Congress \| Arizona CD-5
Election Policy	Lamb’s campaign says he supports requiring identification to vote and pursuing reforms intended to improve election administration and voter confidence. The campaign also says he favors evaluating whether Maricopa County should be divided into smaller counties to improve representation and accountability.	Mark Lamb on The Steve Gruber Show: Common Sense Leadership, Election Integrity & Arizona’s Future Mark Lamb for Congress \| Arizona CD-5
Local Issues	Lamb says his congressional agenda would bring Arizona-focused leadership to Washington, emphasizing support for law enforcement, stopping cartels and enforcing immigration laws, and lowering costs while supporting small businesses, taxpayers, and Arizona jobs. His campaign describes these as priorities affecting Arizona communities and working families, but the reviewed campaign materials do not provide a more detailed district-specific agenda or a new post-August 27, 2026 local-issues statement.	Mark Lamb for Congress — Issues

Review an issue

Healthcare

Lamb's campaign has emphasized health freedom, individual liberty, informed consent, and parental rights by highlighting its endorsement from Stand for Health Freedom. In the campaign's quoted statement, Lamb said Americans deserve leaders who defend constitutional rights, respect individual freedom, and oppose government overreach; the campaign page does not specify a broader healthcare-reform plan.

Sources:

Stand for Health Freedom Endorses Mark Lamb for Congress

Choose another issue above to review the remaining researched positions.

No public position found: Tech & AI, Education

Background

Career History

Sheriff of Pinal County 2017 – 2024

Pinal County Sheriff's Office

Elected as 24th Sheriff; oversaw a county the size of Connecticut with more than 650 personnel.

Police Officer

Salt River Pima-Maricopa Indian Community Police Department

Served for six years as a police officer.

Police Officer / Detective 2012 – 2016

Pinal County Sheriff's Office

Served in law enforcement roles including gang enforcement and criminal investigations before being elected sheriff; joined the department in 2012.

Education

Chandler High School High School Diploma in null (1990)

Top Donors

Raised approximately $1.22 million through the July 2026 reporting period, with about $1.11 million from individual donors, including roughly $515,000 in unitemized small-dollar contributions and $310,000 from donors giving $2,000+. He received about $70,400 in PAC/committee contributions; conservative advocacy groups also spent independently on his behalf, including a reported $250,000 expenditure by Club for Growth. Financial data derives from FEC filings covering October 1, 2025 through July 1, 2026.

Sources

LAMB, MARK - Candidate overview - FEC MARK LAMB FOR CONGRESS - committee overview - FEC A Trump-backed Arizona candidate faces tough House primary after scandals - Politico Fundraising in Arizona's 5th Congressional District - Quiver Quantitative Mark Lamb (R) - Local Candidates

Voting Record

Mark Lamb has never held legislative office and has no congressional roll-call voting record. As Pinal County Sheriff (2017–2024), he was a prominent 'constitutional sheriff' known for immigration enforcement, opposition to mask and vaccine mandates, and testimony before Congress on border security. He has pledged as a candidate to prioritize border security, support mass-deportation policies, and advance legislation stripping immunity from officials he says allow undocumented immigrants to remain on the streets.

Sources

View full voting record Sheriff, Conservative Leader, Family Man - Mark Lamb for Congress U.S. Senate candidate Lamb sued over public records requests - KAWC Mark Lamb wins primary to replace Andy Biggs despite sex scandal - Washington Examiner

About this research

Data compiled from public sources and analyzed using AI. Last updated October 8, 2026. Visit candidate websites for the most current information.