Trader consensus on Polymarket prices an 78% implied probability against another US sovereign debt downgrade before 2027, driven by stable outlooks from major agencies despite escalating fiscal pressures. Moody's Aa1 and Fitch's AA+ ratings, affirmed as recently as August 2025, reflect no immediate governance breakdowns akin to prior debt ceiling crises, with Fitch's January 2026 assessment noting pressures from widening deficits but maintaining stability. CBO's February projections of a $1.9 trillion fiscal year 2026 deficit and debt-to-GDP surpassing 120% by mid-year have heightened scrutiny, yet public debt exceeding GDP for the first time since World War II—as reported early May—has not prompted action. Key catalysts include potential debt ceiling deadlines later in 2026 and Treasury borrowing needs, which could test fiscal policymaking if political gridlock emerges.