Traders assign a 98.4% probability to “No” for Donald Trump traveling to space in 2026 because no official NASA, Space Force, or commercial mission schedule includes the president, and extensive astronaut training, medical certification, and flight manifests make a late-year addition improbable. Recent policy actions emphasize lunar return timelines through 2028 and Mars ambitions via Artemis and private partnerships, yet public statements and White House events have focused on supporting professional crews rather than presidential participation. Logistical, security, and institutional constraints further reinforce the consensus. The principal variables that could still shift odds include an unanticipated short-duration commercial suborbital flight announcement or a major program milestone requiring direct presidential involvement before year-end.