President Donald Trump posted a tweet Thursday morning in which he responded to the claim made Wednesday by J.P. Morgan Chase CEO Jamie Dimon that he thought he could beat Trump in an election. Dimon also claimed that he was smarter than the president.

“The problem with banker Jamie Dimon running for President is that he doesn’t have the aptitude or ‘smarts’ & is a poor public speaker & nervous mess – otherwise he is wonderful. I’ve made a lot of bankers, and others, look much smarter than they are with my great economic policy!” Trump tweeted.