Trump says he was going to fire Comey regardless of attorney general's recommendation

U.S. President Donald Trump blasted ousted FBI chief James Comey as a "showboat" and "grandstander" on Thursday even as the agency's acting leader contradicted the president's account that the FBI had been in turmoil before he fired Comey.

In testimony before the Senate intelligence committee, acting Federal Bureau of Investigation director Andrew McCabe promised to tell the panel of any White House meddling into the agency's probe into possible collusion between Russia and Trump's 2016 presidential campaign.

• Comey firing and Russia dominate at U.S. intelligence hearing

McCabe testified in place of Comey, who Trump abruptly dismissed as FBI director on Tuesday in an action that has roiled Washington.

"He's a showboat. He's a grandstander. The FBI has been in turmoil," Trump told NBC News in his first interview since firing Comey.

"I was going to fire Comey. My decision," Trump said. "I was going to fire regardless of recommendation."

Trump told NBC News he never pressured Comey into dropping the FBI probe, adding, "If Russia did anything, I want to know that."

Trump said there was no "collusion between me and my campaign and the Russians," but added that "the Russians did not affect the vote."

McCabe's testimony at the Senate intelligence committee contradicted Trump's appraisal of turmoil at the FBI under Comey.

"I can tell you also that Director Comey enjoyed broad support within the FBI and still does to this day," McCabe said. "I can tell you that I hold Director Comey in the absolute highest regard. I have the highest respect for his considerable abilities and his integrity."

"And it has been the greatest privilege and honour of my professional life to work with him."

Trump told NBC he had previously asked Comey whether he was under investigation in the Russia matter, speaking with Comey once over dinner and twice by telephone.

"I said, 'If it's possible, would you let me know, am I under investigation?'" Trump told NBC. "He said, 'You are not under investigation.'"

Comey has neither publicly discussed conversations with Trump nor has he publicly commented on his dismissal.

McCabe testified it was not typical practice to tell a person they are not a target of an investigation.

At the daily White House briefing, spokesperson Sarah Huckabee Sanders was asked whether it was a conflict of interest for a president to ask the FBI chief such a question. She answered: "No, I don't believe it is."

Trump's contention that he was going to fire Comey regardless of what Attorney General Jeff Sessions and Deputy Attorney General Rod Rosenstein recommended conflicts with earlier explanations from the White House.

On Tuesday, White House press secretary Sean Spicer had said Trump acted based on the recommendation of Sessions and Rosenstein.

On Thursday, the Republican chairman of the Senate panel, Richard Burr, asked McCabe whether he ever heard Comey tell Trump the president was not the subject of investigation. McCabe sidestepped the question, saying he could not comment on a continuing investigation.

Rosenstein ventured to Capitol Hill to speak with members of the Senate panel. Asked about media reports earlier this week that Rosenstein had threatened to quit, Burr said that issue was not raised.

In his letter firing Comey on Tuesday, Trump wrote, "While I greatly appreciate you informing me, on three separate occasions, that I am not under investigation, I nevertheless concur with the judgment of the Department of Justice that you are not able to effectively lead the Bureau."

"It is my opinion and belief that the FBI will continue to pursue this investigation vigorously and completely," McCabe told the senators.

He said there was no "crisis of confidence within the leadership of the FBI."

• What can fired FBI boss James Comey say now? His opinion, for starters

Democrats have accused the Republican president of trying to foil the FBI's probe into Moscow's actions and many have called for a special prosecutor to look into the matter.

U.S. intelligence agencies concluded that Russian President Vladimir Putin ordered an effort to disrupt the election that included hacking into Democratic Party emails and leaking them, with the aim of helping Republican Trump.

Leaders of the U.S. intelligence agencies, including Director of National Intelligence Dan Coats and CIA Director Mike Pompeo, testified to the senators on Thursday that they agreed with that finding.

Moscow has denied any such interference and the Trump administration denies allegations of collusion with Russia. It has also said Comey's firing was unrelated to the Russia investigation.

The administration said on Tuesday that Comey's firing arose from his handling of an election-year FBI probe into Democratic presidential nominee Hillary Clinton's use of a private email server during her time as secretary of state.

Democrat vows to 'get to the bottom' of Russia question

The Senate intelligence committee's top Democrat, Mark Warner, said in light of Comey's firing, "It is important to restate the critical importance of protecting the independence and integrity of federal law enforcement."

"And while it's clear to me now more than ever that an independent special counsel must be appointed, make no mistake our committee will get to the bottom of what happened during the 2016 presidential election," Warner said.

Warner also said he was not happy with the pace of the committee's probe.

• Democrats want any Russia investigation kept clear of Trump's 'heavy hand'

Responding to Trump's latest comments about Comey, Burr praised the ousted FBI chief as "ethical, upright and straightforward."

Warner said he was offended by Trump's remarks and called Comey a "straight shooter."

Senate judiciary committee chairman Chuck Grassley called on the FBI to publicly confirm whether or not it is probing Trump.

In a statement, Grassley said that Comey had previously briefed him and the panel's top Democrat, Senator Dianne Feinstein, and that the lawmakers "heard nothing that contradicted the president's statement."

Former Republican congressman Mike Rogers is being considered as a candidate to replace Comey, a senior White House official said.