Tonight on The Last Word: Democratic Sen. Cortez Masto closes the gap in the tight Nevada Senate race. Also, NBC News projects that Democrat Adrian Fontes wins Arizona's secretary of state election. And the Georgia runoff could determine the Senate's balance of power. Steve Kornacki, Rep. Greg Stanton, Sen. Jacky Rosen, Sen. Amy Klobuchar, Arizona Secretary of State-elect Adrian Fontes and Rep. Nikema Williams join Lawrence O'Donnell.

Tonight on The Last Word: Donald Trump launches his 2024 presidential campaign amid multiple criminal probes. Also, Sen. Mitch McConnell says voters were "frightened" by the "chaos, negativity and excess attacks" within the GOP. Plus, President Biden meets with G7 leaders after an explosion in Poland. And Ukraine President Zelenskyy says the liberation of Kherson is a turning point in the war. Andrew Weissmann, Rep.-elect Dan Goldman, Rep. Matt Cartwright, Peter Alexander, Ben Rhodes and Timothy Snyder join Lawrence O'Donnell.