The Supreme Court deals President Donald Trump a setback ahead of the 2026 midterm elections, blocking the administration from enforcing new U.S. Postal Service requirements for mail-in ballots. White House correspondent Jon Decker explains the ruling, why state and local election officials challenged the changes, and what could happen next as litigation continues. The Supreme Court's decision leaves a lower-court injunction in place, meaning the disputed requirements will not take effect for the upcoming midterms.

Plus, President Trump pushes back against calls for additional artificial intelligence regulation amid growing warnings from technology executives and researchers about the potential risks of rapidly advancing AI. Trump argues that slowing American AI development could give China an advantage, while lawmakers continue debating additional federal safeguards.

Also on the White House Briefing Room: Donald Trump Jr. and Bettina Anderson respond to reports that Russian businessman Umar Kremlev financed post-wedding celebrations in the Bahamas, and the Kennedy Center board considers closing its main building for a major renovation amid a continuing dispute over President Trump's name on the institution.