Former FBI chief James Comey arrives to testify on Trump

One of the most anticipated moments in recent US political history has begun, as sacked FBI boss James Comey arrives to testify on President Donald Trump.

Former FBI Director James Comey has arrived in a Senate hearing room where he will deliver long-awaited testimony about his dramatic firing.

Senators will ask Comey about his interactions with President Donald Trump before he was fired in May.

Former FBI director James Comey arrives at the Senate Intelligence Committee hearing in Washington. Photo: AAp
Former FBI director James Comey arrives at the Senate Intelligence Committee hearing in Washington. Photo: AAp

Comey has said he had a series of uncomfortable conversations with Trump.

He said Trump asked him for a pledge of loyalty and pushed him to "lift the cloud" of the Russia investigation by declaring publicly the president was not the target of the probe into his campaign's ties with Moscow.

Comey at the Senate Intelligence Committee Hearing in Washington on Thursday. Source: AAP
Comey at the Senate Intelligence Committee Hearing in Washington on Thursday. Source: AAP

A source told AP Trump "disputes" Comey's claim that he asked for loyalty and to let go of the Mike Flynn probe.

Comey's remarks are his first since he was fired.

In Comey's seven-page statement he remarks that he told the President three times that he was not personally under investigation by the FBI.

President Trump in Cincinnati on Wednesday June 7. Photo: AAP
President Trump in Cincinnati on Wednesday June 7. Photo: AAP

“The President is pleased that Mr Comey has finally publicly confirmed his private reports that the President was not under investigation in any Russian probe,” President Trump's lawyer Marc Kasowitz said in a statement.