The math on President Trump's tariff strategy just changed dramatically. What looked like a $4 trillion windfall has shrunk to $3 trillion, leaving budget planners scrambling to adjust their calculations and raising fresh questions about ambitious promises tied to that revenue. The Congressional Budget Office delivered the sobering news this week, slashing its tariff revenue estimate by $1 trillion through 2035. The adjustment reflects both Trump's recent pattern of walking back duties and economists gaining a clearer picture of how goods actually flow into the country.