Comey also said during Monday's hearing that DOJ has found "no information" supporting Trump's claim former President Barack ObamaBarack ObamaCoons slams Spicer for "mischaracterizing" remarks on Trump-Russia collusion Scarborough: Today is "the worst day" of Trump presidency Federal Bureau of Investigation director: "No information" to support Trump wiretapping claims MORE wiretapped him.
During a Monday morning hearing before the House Intelligence Committee, FBI Director James Comey publicly rejected Donald Trump's wiretapping allegations against Barack Obama.
The US intelligence community has publicly blamed Russian Federation for hacks of the Democratic National Committee a year ago, and suggested the cyber attacks were aimed at steering the election to a Trump victory.
The surveillance allegation became an issue when Mr Trump earlier this month accused Mr Obama of wiretapping Trump Tower in NY, which housed the campaign headquarters for the Republican's surprise election win against Democrat Hillary Clinton.
"I asked you whether the intelligence community had undertaken any sort of study to determine whether Russian Federation interference had any influence on the electoral process and I think you told me the answer was no", Himes said, referring to questions earlier in Monday's hearing.
This is the first public confirmation of an investigation which began last summer, and it comes at the outset of Mr Comey's opening statement to a congressional hearing examining Russian meddling and possible connections between Moscow and Mr Trump's campaign. And Comey said law enforcement officials were investigating potential links between top Trump campaign figures and the Russian Federation government.
"Because it is an open ongoing investigation and is classified, I can not say more about what we are doing and whose conduct we are examining", Comey added.
Rogers said under questioning from the top Democrat on the committee that there was no information that the Obama administration requested the British surveillance agency GCHQ to conduct eavesdropping on Trump, as stated in a Fox News report that has been cited by the White House.
"I know speculating is part of human nature, but it really isn't fair to draw conclusions simply because I say that I can't comment", Comey said. "The department has no information that supports those tweets", he said.
Moreover, Rogers also added that he had seen no evidence that anyone else in the NSA or the Obama administration had made such a request. He restated that there was not a wiretap against Trump Tower, but did not rule out other kinds of surveillance against the Trump campaign. Trump tweeted early Monday as news coverage on the Russian Federation allegations dominated the morning's cable news.
Mr Trump fired his first national security adviser, Michael Flynn, last month after he failed to disclose contacts with Russia's ambassador before Mr Trump took office on 20 January.
Minutes later, Rep. Adam Schiff, the ranking Democrat on the intelligence committee, responded.