WASHINGTON ― Former National Security Adviser John Bolton is back to criticizing President Donald Trump following last week's FBI search of his home and office.

Bolton, speaking out for the first time since the FBI conducted its searches, penned an Aug. 25 op-ed in the Washington Examiner that referenced the FBI investigation as the former Trump aide resumed criticizing Trump's foreign policy on Ukraine.

"Donald Trump’s Ukraine policy today is no more coherent than it was last Friday when his administration executed search warrants against my home and office," Bolton wrote, repeating the same line in a post X. "Collapsing in confusion and haste, Trump’s negotiations may be in their last throes, along with his Nobel Peace Prize campaign."

The focus of the FBI's Aug. 22 searches targeting Bolton wasn't clear, but Vice President JD Vance said it involved "classified documents." Democrats have slammed the Justice Department's investigation of Bolton as a politically motivated attack against a Trump adversary.

During Turmp's first term, the Justice Department started a criminal investigation and filed a federal lawsuit that sought to block publication of Bolton's book, "The Room Where It Happened: A White House Memoir.”

Bolton, who also served as U.S. ambassador to the United Nations, has been a regular critic of Trump since serving for him in his first term. Trump has previously canceled Bolton’s security clearance and security detail, despite an Iranian assassination plot.

"I'm not a fan of John Bolton," Trump told reporters last week after the FBI executed its searches of Bolton's Bethesda, Maryland home and Washington D.C. office. "He's a real sort of a lowlife."

Contributing: Bart Jansen of USA TODAY

This article originally appeared on USA TODAY: John Bolton rips President Trump days after FBI search of home and office

Reporting by Joey Garrison, USA TODAY / USA TODAY

USA TODAY Network via Reuters Connect