President Trump said Friday that construction of his promised border wall would start "immediately" after signing the omnibus spending bill, which included $1.6 billion in funding for the wall.

"We're going to be starting work literally on Monday," Trump said during an event Friday at the White House. "We have a lot of money coming to the border."

Trump had threatened earlier Friday to veto the spending bill Congress passed on Thursday because it did not include sufficient funding for the wall and because it omitted expiring protections for young, undocumented immigrants.

Although the White House requested $25 billion in funding for wall construction, lawmakers included just $1.6 billion in the final version of their omnibus. That money can only go to fencing, however, and cannot be used to build a concrete wall anywhere along the border.

"Not happy with $1.6 billion for the wall," Trump said.

Still, Trump described the sum as an "initial down payment" on the wall that would allow his administration to begin building it right away.

"This is short term funding, but it's immediate," Trump said.

The White House had attempted to trade three years of border wall funding for a three-year extension of the Deferred Action for Childhood Arrivals program, which Trump set to wind down on March 5. However, Democrats rejected the deal because they wanted the administration to provide a path to citizenship to everyone eligible for DACA, not just those who enrolled previously.

No DACA provisions ultimately ended up in the bill, and Trump blamed Democrats for preventing a legislative transaction that would have traded DACA for wall funding.

"They did not want DACA in this bill," Trump said of Democrats.