Politics Polymarket July 22, 2026
Mark Lamb wins Republican primary in Arizona's 5th District
AZ-05 Republican Primary Winner
Polymarket prices this Mark Lamb at 100%.
Mark Lamb won the Republican primary for Arizona's 5th Congressional District on July 21, 2026, earning the GOP nomination to contest the seat in November. The Associated Press projected Lamb as the winner, as reported by 12News and KJZZ. Lamb's victory followed a campaign built on strong ties to Donald Trump, who reaffirmed his support for the self-described MAGA Warrior ten days before the primary, and a pledge to oppose new taxes signed with Americans for Tax Reform. The New York Times had reported on a sex scandal involving Lamb in the run-up to the vote, but the controversy did not prevent him from securing the nomination. The market had positioned Lamb as an overwhelming favorite at 100%, and the crowd's read proved correct.
Background
Lamb, a former sheriff, built his campaign around his law enforcement background and proximity to Trump, who publicly backed him as a MAGA Warrior. He reinforced conservative credentials with a no-new-taxes pledge. The New York Times raised questions about a sex scandal days before the vote, but the race broke toward Lamb regardless. On the Democratic side, Elizabeth Lee won her party's primary, setting a general-election contest in a district Fox News has described as a toss-up that could determine which party controls Congress after the midterms.
What the coverage agrees on
- Mark Lamb won the Republican primary for Arizona's 5th Congressional District.
- The Associated Press projected Lamb as the winner.
- Elizabeth Lee won the Democratic primary in the same district.
- Donald Trump publicly reaffirmed support for Lamb before the primary.
How outlets frame it
- The New York Times: Raised the question of whether a sex scandal involving Mark Lamb would affect his prospects in the GOP primary, a line of inquiry that the result ultimately rendered moot.
- Fox News: Framed the broader Arizona House race as a toss-up that could determine which party controls Congress after the midterms.
What to watch
Lamb advances to face Democratic nominee Elizabeth Lee in what Fox News characterizes as a toss-up race with implications for party control of the House. Whether the general-election campaign revisits the scandal coverage that surfaced before the primary, and whether Lamb's Trump-aligned messaging holds in a competitive district, will shape the November contest.
The numbers behind this
Polymarket prices this Mark Lamb at 100%.
24h +14.1 pts 7d +11.6 pts
$143K traded · $24.4K in the last day · $598K resting liquidity · $37.6K open interest
Resolves on: This market will resolve according to the candidate who wins the nomination for the Republican Party to contest the AZ-05 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The Republican primary will take place on July 21, 2026. If no nominee is announced by November 3, 2026, 11:59PM ET, this market will resolve to "Other". The resolution source for this market will be a consensus of official Republican sources, including https://www.rnc.org/. Any replacement of the nominee before election day will not change the resolution of the market.
Pricing Polymarket 100%
Sources
- Mark Lamb wins Republican primary, Elizabeth Lee wins Democratic primary in Arizona CD5 kjzz.org
- Will a Sex Scandal Involving Mark Lamb Matter in Arizona GOP House Primary? nytimes.com
- Mark Lamb projected as the Republican nominee for Arizona's 5th Congressional District, AP reports 12news.com
- President Trump reaffirms support for ‘MAGA Warrior’ Mark Lamb azfamily.com
- Mark Lamb Makes “No New Taxes” Promise to Arizona Voters atr.org
Frequently asked questions
AZ-05 Republican Primary Winner
Polymarket prices this Mark Lamb at 100%.
What do the sources agree on?
Mark Lamb won the Republican primary for Arizona's 5th Congressional District. The Associated Press projected Lamb as the winner. Elizabeth Lee won the Democratic primary in the same district. Donald Trump publicly reaffirmed support for Lamb before the primary.
When does this market resolve?
This market resolves on: This market will resolve according to the candidate who wins the nomination for the Republican Party to contest the AZ-05 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The Republican primary will take place on July 21, 2026. If no nominee is announced by November 3, 2026, 11:59PM ET, this market will resolve to "Other". The resolution source for this market will be a consensus of official Republican sources, including https://www.rnc.org/. Any replacement of the nominee before election day will not change the resolution of the market.
How are these odds set?
Prediction-market odds are prices set by people trading real money on the outcome, so the price reads as the crowd’s implied probability — not a guarantee or financial advice.
AI-written briefing grounded in 5 sources and the live market, edited by Samuel Jo. Odds are crowd probabilities, not advice — how this works.