President Donald Trump has promised a $5,000 “dividend” to every adult U.S. citizen if Republicans keep control of both chambers of Congress in November.

There’s just a little problem. The U.S. Treasury doesn’t have the money to write this check.

Trump made the pledge Wednesday night at the Republican midterm convention in Dallas, branding it the Trump Dividend.

“Here’s my promise. If the Republicans win the House of Representatives and the United States Senate […] I will issue a dividend to every adult citizen in the United States of $5,000”

The potential price tag: $1.23 trillion.