Marco Rubio warns Cuba can’t “stall” diplomacy, cites national security threats

On 2026-05-21, U.S. Secretary of State Marco Rubio warned that Cuba could not "stall" in diplomacy and said Washington views Cuba as a national security threat. He made the remarks at a press conference in Washington, D.C., while also saying the United States prefers a negotiated and peaceful agreement but sees little progress with Havana.