President Donald Trump threatened to veto the $1.3 trillion omnibus spending bill already passed by Congress on Friday.

The about-face comes a day after White House officials issued public assurances the president would sign the legislation despite his misgivings about it. The government will shut down at 12:01 a.m. Saturday if Trump does not sign a funding bill into law.

In a tweet, Trump said he is “considering a VETO” because the proposal does not extend protections for hundreds of thousands of young undocumented immigrants or fully fund his proposed border wall.

 

The president’s tweet throws more chaos into the process to keep the government running, even after it looked Friday morning like Trump’s signature would only be a formality. On Thursday, Office of Management and Budget Director Mick Mulvaney told reporters Trump “looks forward to signing” the bill. The president will support it “because it funds his priorities,” Mulvaney said.

The Senate had adjourned and was not expected to take up legislative work again until April 9.

This story is developing. Please check back for updates.