On Thursday afternoon, the top Republican and Democrat on the Senate Intelligence Committee refuted the president's evidence-free claim that the Obama administration had wiretapped him during last year's presidential campaign.
In response to top lawmakers on the Senate Intelligence Committee finding "no indications" that Trump Tower "was the subject of surveillance by any element of the United States government" Nunes said that was impossible to determine at this stage of the investigation.
Republican Richard Burr, chairman of the Senate Intelligence Committee, and the committee's Democratic vice chair Mark Warner, said in a statement that they had received no information to support Trump's claim, made in a tweet on March 4.
President Donald Trump refused Friday to back down from claims that President Barack Obama ordered his phones tapped during the closing days of the presidential election even after congressional intelligence committees leaders said they had no evidence the incident happened.
While the FBI has kept silent on Trump's claim, its director, Jim Comey, is slated to testify on the Russian Federation investigation Monday before Nunes and Schiff's committee, where he is nearly certain to face questions about placing Trump and his associates under surveillance.
Mike Rogers, the director of the National Security Agency, will testify before the panel along with Comey.
The rebuke comes a day after the House Intelligence Committee offered a similar assessment, leaving the White House virtually alone in asserting the surveillance claim.
The Republican president, without providing evidence, has accused his predecessor, Democrat Barack Obama, of wiretapping him near the end of the campaign.
Trump said in a Fox News interview Wednesday that "you're going to find some very interesting items coming to the forefront over the next two weeks" related to the accusation, without saying specifically what those are.
"We don't know how anybody would have that information unless they have different information than me because we know that Flynn was picked up on incidental collection", Nunes said.
But Nunes said that while Trump claimed Obama personally engaged in secret surveillance, Americans would have to decide whether to season his tweets with a grain of salt.
"In fact, I don't believe just in the last week of time, the people we've talked to, I don't think there was an actual tap of Trump Tower".
The New York Times article Trump references says the FBI has used intercepted communications in its investigation of several Trump associates and their ties to Russian Federation.
"We're not here to listen to speeches", Nunes said.
"Is it legal for a sitting President to be "wire tapping" a race for president prior to an election?" he said in another tweet.
"Well, because the New York Times wrote about it", Trump replied.