Former FBI Director James Comey James Brien ComeyDemocrats fear Russia interference could spoil bid to retake Senate Book: FBI sex crimes investigator helped trigger October 2016 public probe of Clinton emails Trump jabs at FBI director over testimony on Russia, antifa MORE said he doesn't know what the GOP stands for anymore in the current state of politics.

"I don't know what it stands for, honestly," Comey told Bloomberg in an interview when asked if he worries for the future of the party. "Where are the values the Republican Party stands for? Rule of law? Really?"

The former bureau chief, who was fired by President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE a year ago, has become one of the administration's sharpest critics, as Trump and powerful Republican lawmakers continue attacking the FBI and Department of Justice for alleged bias toward the president.

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Comey, who was appointed to lead the FBI by former President Obama, says he is no longer a Republican.

"It [the party] kind of left me is how I think about it," he said.

Comey made a similar comment to ABC News last month, suggesting he and the party began to split ways during the 2016 presidential election cycle.

Comey delved into his feuds with the administration in his new book "A Higher Loyalty: Truth, Lies, and Leadership," which details his contentious relations with the president and his top officials in the opening phase of the Russia investigation.

It was Comey who originally headed the probe, which is seeking evidence of Russian tampering in the 2016 election and possible Russian collusion with the Trump campaign, before he was fired and it was handed to special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE.