Vice President JD Vance directly blamed President Donald Trump’s war with Iran for the Republican Party’s sweeping losses in Tuesday’s midterm elections, saying the conflict was the central reason voters turned against the GOP.

“The reason we lost is the war,” Vance wrote, pointing to President Trump’s own acknowledgment the previous night that the conflict contributed to Republican losses. “Everyone knows why we lost. And any honest conversation about where we go from here must start there.”

Vance said Republicans had been warned before the election that they were at risk of losing support among voters who backed Trump and Vance in 2024 but were now considering voting for Democrats. According to Vance, an adviser identified four issues the party needed to address to maintain its congressional majority: ending the war, focusing on the cost of living and inflation, putting America First, and changing the U.S. relationship with Israel.

Vance argued that Republican voters did turn out, but many did not support GOP candidates. He also challenged those who believe the military campaign was worth the political consequences.

“If you’d like to argue it was worth it, that losing the Senate for the next 6 years was worth it, then do so. Argue it was a worthwhile cost to pay. Agree or disagree, that’s at least honest,” he wrote.

His comments came a day after Trump acknowledged that the Iran war played a role in the Republican losses, telling The Wall Street Journal that it was “a piece of it.” Trump nevertheless defended the decision to launch the military campaign, saying he would make the same choice again.

Vance had reportedly expressed reservations about entering the conflict before Trump ordered the strikes. He later took a leading role in diplomatic efforts to bring the war to an end, although those efforts have faced significant challenges.

The election handed Democrats control of both the House and Senate, leaving the Republican Party facing a difficult reassessment of its domestic and foreign policy priorities. Vance’s remarks put the Iran war and the administration’s relationship with Israel at the center of that debate.

This article was independently written by the BJL Newsroom based on reporting from The Wall Street Journal, The Washington Post and The Associated Press.