President Donald Trump said on Sunday that if the Supreme Court were to rule against his ambitious tariff agenda, America’s national security would be greatly harmed.

When asked by Fox News host Maria Bartiromo on Sunday Morning Futures whether the president has a backup plan in case the Supreme Court strikes down his use of tariffs, Trump responded, “Well, I’ll have to figure something out. I don’t want to even think about it. We’re doing so well to think about it.”