President Trump endorsed video game composer Marty O’Donnell on Tuesday in the race for Nevada’s 3rd Congressional District, a district widely regarded as one of the nation’s most competitive. With Republicans holding a razor-thin majority in the U.S. House, securing every seat is critical to maintaining their legislative position.

In a Truth Social post, Trump described Democratic incumbent Rep. Susie Lee (D-NV) as a “true Radical Left Extremist” who does not represent Southern Nevada values. He accused her of advocating for open borders, allowing men to compete in women’s sports, universal transgender inclusion, defunding police, and restricting Second Amendment rights. Trump also noted that Lee voted against the nation’s largest tax cut in history and actively worked to eliminate rural healthcare programs—a significant factor in Nevada’s 3rd Congressional District.

O’Donnell, who previously sought the GOP nomination but did not advance to the general election, is best known as co-composer of soundtracks for Bungie’s Halo series. Trump praised O’Donnell as a “World-Class Composer and Entrepreneur” who champions America-first policies to create jobs, reduce taxes and regulations, promote no tax on tips, support made-in-the-U.S.A., and secure the nation’s “Golden Age.” He pledged that O’Donnell would work tirelessly to unleash American energy dominance, secure borders, stop migrant crime, uphold law and order, strengthen military and veteran programs, and protect Second Amendment rights.

Lee recently deleted a social media post in which she described Trump as “fing fed up” following his attendance at Supreme Court oral arguments. She later apologized for using profanity.

O’Donnell, who placed fourth in the 2024 GOP primary for Nevada’s 3rd Congressional District, stated that he would have withdrawn from the race without Trump’s endorsement. In a Tuesday statement, O’Donnell expressed gratitude for Trump’s support and urged Republicans to unite behind “the President and me” to preserve their majority.

O’Donnell will attend Trump’s Las Vegas event this week but will not participate in formal programming. He must win the primary to challenge Lee, who has held the seat for four terms, in Nevada’s most competitive battleground district.