President Trump has continued to stand by the unsubstantiated claims, including while meeting with German Chancellor Angela Merkel Friday.
After Trump's Twitter posting March 4 claiming that former President Barack Obama "had my "wires tapped" in Trump Tower just before the victory", Comey unsuccessfully urged the Justice Department to publicly deny the allegation, according to a USA official who requested anonymity in order to discuss sensitive issues. We are going to give you the tools to keep us safe, even if it infringes on privacy some.
"We know that the Russians were trying to get involved in our campaign, like they have for many decades".
A separate tweet referenced James Clapper, the director of national intelligence under President Barack Obama, who has said that Trump's allegation that Obama wiretapped Trump Tower is false. He joins "CBS This Morning" to preview Monday's hearing with FBI director James Comey on the investigation into Russian interference in the US presidential election. A new Reuters investigation reveals dozens of Russian elites have invested almost $100 million in seven Trump-branded luxury buildings in Florida. "That includes any links between the Trump campaign and Russian government, and whether there was cooperation".
Rep. Devin Nunes of California, the committee's Republican chairman, said on "Fox News Sunday" that "the president doesn't go and physically" wiretap someone.
Both FBI Director James Comey and Director of the National Security Agency Mike Rogers testified to the Russian interference.
"The real story that Congress, the Federal Bureau of Investigation and others should be looking into is the leaking of classified information", he added.
Trump also tweeted that the "real story" is the leaking of classified information. "Must find leaker now!" I would characterize it this way at the outset of the investigation: There is circumstantial evidence of collusion.
He said the FBI started investigating the matter in July and that its work was still in the early stages.
A hearing Monday before one of several congressional panels probing allegations of Russian meddling, the House Intelligence Committee, could allow for the greatest public accounting to date of investigations that have shadowed the Trump administration in its first two months.
Mr Nunes said: "For the first time, the American people, and all the political parties now, are paying attention to the threat that Russian Federation poses".
Mr Nunes said a leak involving Mr Trump's former aide Michael Flynn was "the one crime we know" of in his investigation into accusations of Russian interference in the United States election. They're not likely to hear dissent from committee members on that score.
His appearances on Capitol Hill since then have occurred in classified settings, and he has made no public statements connected to the Trump campaign or Russian Federation.
Any lack of detail from Mr Comey would likely be contrasted with public comments he made a year ago when closing out an investigation into Mrs Clinton's email practices and then, shortly before election day, announcing that the probe would be revived following the discovery of additional emails.