Rep. Ilhan Omar's claim that the US spends 57% of the federal budget on defense is wrong. It's 15%

Published Dec 13, 2019. By Tom Kertscher.

At the time, military spending, including spending on homeland security, accounted for 54% of discretionary spending — that is, not-mandatory spending. 

But it accounted for only 16% of federal spending overall.

"This is a common mistake," Robert Bixby, executive director of the centrist Concord Coalition, which works for fiscal responsibility, said about Omar’s claim.