Republican Congressman Steven Palazzo of Mississippi is introducing legislation to direct the Treasury Department to issue government savings bonds to pay for a physical barrier between the U.S. and Mexico, one of Trump’s signature issues.

“This legislation would allow for the patriots of today’s era to help support American security in the same way as previous generations,” Palazzo said in a statement on the legislation, known as The Border Bonds for America Act. Bonds sold during World War II brought in $185 billion from 85 million Americans, he said to Bloomberg.

Lawmakers are facing a Friday night deadline to reach an agreement on how to fund government departments that account for about a quarter of all discretionary spending. Trump wants at least $5 billion for the wall, while Democrats say they won’t agree to more than $1.37 billion for border fencing.