President Trump is considering slashing funding to airport security across the nation, the Federal Emergency Management Agency, and the Coast Guard in order to pay for the proposed US-Mexico border wall, according to a report.

The Coast Guard’s budget would be pared by $1.3 billion, and spending for the Transportation Security Administration and FEMA would get sliced by $900 million, according to the Washington Post, citing a draft proposal in front of the Office of Management and Budget.

As a candidate, Trump pledged to slash the size of the federal government, though as president he has proposed increasing the budget of the Department of Defense by more than $50 billion.

He has also proposed increasing the number of Border Patrol and Immigration and Customs Enforcement agents.

“The Budget prioritizes DHS law enforcement operations, proposes critical investments in front line border security and funds continued development of robust cybersecurity defenses,” the draft states, according to the Washington Post.

“The Budget aggressively implements the President’s commitment to construct a physical wall along the southern border,” it adds.

The border wall could cost $15 billion, according to estimates.

Trump pushed the US-Mexico border wall throughout his presidential campaign. But he claimed that Mexico would foot the bill, an assertion he still maintains.

However, the president now says the US will first pay for the border wall and later seek to be reimbursed for it.