Democrats described the proposal as a betrayal of the populist message Trump struck during the campaign. They pointed out that it put taxpayers on the hook for $2.6 billion to begin work on a wall along the U.S. border with Mexico. During the campaign, Trump repeatedly said Mexico would pay for the wall. And they noted the budget also proposes to cut infrastructure spending, an apparent departure with Trump's vow to spend $1 trillion rebuilding highways, bridges and airports.