**Republican control of the White House and both chambers of Congress has produced unified party government, sharply reducing the prospects for any veto override in 2026.** President Trump has issued a small number of vetoes since taking office in January 2025, including measures on water infrastructure and tribal lands; House override attempts failed to reach the required two-thirds threshold, with recent votes falling well short despite some Republican defections. The current slim Republican majorities (roughly 218-212 in the House and 53-45 in the Senate) have generally sustained presidential positions on contested legislation, consistent with historical patterns under unified government. Upcoming midterms in November 2026 and the short remaining legislative calendar further limit opportunities for cross-aisle coalitions large enough to override. Traders therefore assign a 93.5% probability that no override will occur through the end of the year.