President Donald Trump on Wednesday offered a critical response after the Biden administration officially ended his Migrant Protection Protocols policy that directed illegal immigrants and some asylum-seekers to stay in Mexico while waiting for their court date.

Trump said that his 2019 directive, sometimes known as the “remain in Mexico” policy, was a “historic foreign policy triumph ” and was among the “most successful border security programs” devised in recent memory.

“Along with our Central America Safe Third agreements, asylum reforms, and expedited removal procedures we drove border numbers to record lows and we ENDED the horrendous practice known as Catch-and-Release,” Trump said.

On Feb. 2, President Joe Biden called on agencies responsible for enforcing immigration rules to review the protocols and consider its termination.  On Tuesday, the Department of Homeland Security (DHS) officially terminated the policy, coming months after Biden suspended it.

DHS Secretary Alejandro Mayorkas, in a memo, instructed employees that the agency will no longer be enforcing the mandate and asserted that it did not “adequately or sustainably enhance border management.”

Trump’s statement said that by ending the Migrant Protection Protocols and a slew of other recent executive orders, “Biden is the first American President who doesn’t want America to be a nation at all.”

The former Republican commander-in-chief, furthermore, appeared to dispute statements from Biden, Mayorkas, and other White House officials saying that they inherited a broken immigration system. During a press conference in March, Biden defended his administration’s policies and alleged the current surge of illegal immigrants along the border “happens every single solitary year” and that “nothing has changed,” while saying that the Migrant Protection Protocols wouldn’t stop the flow of people arriving at the border.

But Biden, Trump said, “inherited the most secure border in history, and they turned it into the greatest border disaster in history” and said the U.S.-Mexico border is now “run by cartels, criminals, and coyotes.”

The U.S. Customs and Border Protection in April said that there were 172,000 encounters between Border Patrol agents and illegal immigrants in March, including nearly 19,000 unaccompanied minors, or children who illegally enter the country without an adult.