Victor Marx (R-CO) won the Republican nomination for governor of Colorado on Thursday, July 9, 2026 [2].

The victory establishes the GOP candidate who will face the Democratic nominee in the general election to lead the state. The result follows a closely watched primary that remained undecided until the final stages of the count.

Marx secured the nomination after maintaining a razor-thin lead as county clerks finalized the vote totals [1]. He defeated state Sen. Barb Kirkmeyer (R-CO) by approximately 2,500 votes [1].

The narrow margin of victory highlights a competitive race within the party. Election officials worked through the final tallies on July 9, 2026 [2], to confirm the winner as the primary crossed the finish line.

Throughout the counting process, the lead fluctuated, but Marx ultimately held the advantage. The final results place him as the official Republican nominee for the gubernatorial seat in the U.S. state of Colorado.

Victor Marx (R-CO) won the Republican nomination for governor of Colorado

The narrow margin of victory suggests a divided or highly competitive Republican base in Colorado. With only 2,500 votes separating the candidates, Marx will need to consolidate party support and bridge any ideological gaps between his supporters and those of Sen. Kirkmeyer to maintain a unified front for the general election.