New York City's police commissioner slammed President Trump’s budget proposal Thursday, saying it would gut federal funding for the New York Police Department (NYPD) and hurt the department's counterterrorism unit.

“Under the president’s proposal, nearly all federal funding to the NYPD would be eradicated. This funding is absolutely critical. It is the backbone of our entire counter-terrorism apparatus,” NYPD Commissioner James P. O’Neill said during a press briefing.

He also took to Twitter, announcing the impact these cuts would have on his department:

Under @POTUS budget, virtually all fed funding to #NYPD eradicated. Entire counterterrorism apparatus in nation's top terror target hobbled. pic.twitter.com/Vetyv1aZrH — Commissioner O'Neill (@NYPDONeill) March 16, 2017

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O’Neill suggested the budget cuts would cause the NYPD to “completely” lose grant funding, pointing to about $110 million the department receives annually from the Homeland Security Grant Program.

The White House budget proposal states that it reduces or eliminates $667 million for Federal Emergency Management Agency (FEMA) programs "that are either unauthorized by the Congress ... or that must provide more measurable results."

The blueprint lists the Homeland Security Grant Program as an example of a program requiring "more measurable results." The program had more than $1 billion in overall funding in 2016, according to FEMA's website.

The NYPD is the largest local police department in the country and employee nearly 35,000 uniformed officers.

The department has an annual budget of $5.2 billion for fiscal 2017, according to the New York City Council. The NYPD also now protects Trump Tower, which costs the city nearly $500,000 a day.

O’Neill said the financial cuts would affect its counterterrorism programs, including the city’s intelligence analyst program, the department’s bomb squad team and active-shooter preparedness training, which tens of thousands of officers receive. O’Neill indicated that it is unclear how the cuts will impact his department’s other policing duties.

While Trump repeatedly promised on the campaign trail to keep the country safe, O’Neill’s argued the president’s budget will strip essential funding to keep his city safe.

“It is the cornerstone of effective preparedness and prevention against terrorist threats, and enables us to do what we can do to keep this city secure. Everyone who lives in, works in, and visits New York City, this money’s critical to keeping everybody safe,” he said.

“New York City remains one of the top terror targets in the world, and certainly the top target in the United States,” O’Neill continued. “The federal government has long acknowledged that fact, and to cut that funding would make us increasingly less safe."