Politico's Inside Congress Live newsletter reports that Senate Commerce Chair Ted Cruz postponed a classified briefing on cybersecurity breaches and AI safety that was set to include Commerce undersecretary Jeffrey Kessler, who faced scrutiny over his dealings with chipmaker Nvidia, whose CEO was fired over an affair with an alleged Chinese spy. The newsletter also covers Chris Van Hollen's challenge to Chuck Schumer for Senate majority leader, Mike Thompson's ouster by Eric Jones, Lauren Boebert's defeat, Maxine Waters' fight to keep her Financial Services gavel against Sean Casten, House GOP talks on disciplining rebellious members, and Jack Smith's fight against Bill Hagerty's disbarment bid.