EconomyThe $40 Trillion Problem Washington Won’t Talk About

US national debt has topped $40 trillion, and persistent deficits are pushing up long-term interest rates. Economists including Yale Budget Lab’s Natasha Sarin say heavier government borrowing eventually raises household costs for mortgages, car loans and other financing. Former House Speaker Paul Ryan says the country can still change course, but must confront politically difficult questions, including those involving entitlements.