Mark Lamb Enters Crowded GOP Primary For CD5 To Replace Biggs

October 24, 2025

By Matthew Holloway |

Former Pinal County Sheriff Mark Lamb filed a statement of interest Monday to seek Arizona’s 5th Congressional District seat and announced his candidacy Wednesday, placing himself into a growing Republican field.

The filing, reported by AZFamily on Tuesday citing sources close to Lamb, confirmed speculation that the two-term former Sheriff would bring his national name recognition from his 2023 U.S. Senate bid into the race. Lamb announced his campaign publicly on The Charlie Kirk Show late Wednesday morning, telling guest host Tyler Bowyer, “I believe in God, family, freedom, I believe in the rule of law, believe in America, believe in all the things that built this country, and, like you said, we need proven fighters in this in this realm right now.”

Arizona State Senator Jake Hoffman quickly took to X, claiming the title of Lamb’s first official endorsement, writing, “Proud to be the first person to officially endorse Mark Lamb for Congress in AZ-CD5! I’ve spent months talking with Mark about running. I’m grateful God has called him to the fight for liberty in Congress. Mark will win. It’s time for conservatives to rally behind Mark.”

Lamb’s entry bolsters a competitive GOP primary in the conservative district, which stretches from Gilbert and Chandler to Queen Creek and eastern Mesa. Early contenders include former state Rep. Travis Grantham and ex-NFL kicker Jay Feely, with more speculated names like Gilbert Councilman Monte Lyons and home-builder Daniel Keenan, as well as Theologian and Army Chaplain (ret.) Alex Stovall. 

A poll from NextGen Polling on October 12th, reflecting the Fifth Congressional District’s demographics, was based on 830 responses with a margin of error of ±3.3 percent at 95 percent confidence, according to the pollster. The poll showed Lamb with a commanding 54 percent lead in a ballot test among likely GOP voters against his top four likely challengers.

Lamb’s name recognition appeared to be a decisive advantage. NextGen Polling wrote, “In terms of name recognition, Keenen was identified by 49 percent of respondents, and Stovall by only 43 percent, indicating that more than half of likely voters are either unfamiliar with them or lack a clear opinion.” Meanwhile, 96 percent of respondents gave Lamb near-universal name recognition according to the poll.

“The polling is sending us a clear message,” said Gregg Pekau, managing partner at NextGen Polling. “Voters in congressional district 5 want to elect Sheriff Mark Lamb to Congress, and campaigning from other candidates is doing little to change their minds. After our last 3 quarters of polls, we’ve seen zero real improvement or movement from Feely, Grantham or Keenan. Without a major move by any of them soon, this race is over if and when Sheriff Lamb enters the race.”

Lamb’s platform details have yet to be announced, but his past campaigns emphasized border security and election integrity, America First tent poles he’s likely to carry forward. The district’s R+10 rating from Cook Political favors Republicans, but the late entrants could muddy the waters.

Lamb’s campaign did not immediately respond to requests for comment.

Matthew Holloway is a senior reporter for AZ Free News. Follow him on X for his latest stories, or email tips to Matthew@azfreenews.com.

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