"Was there a physical wiretap of Trump Tower? No, there never was," Devin Nunes said. | Getty Nunes: There 'never was' evidence of a wiretap at Trump Tower

The chairman of the House Intelligence Committee said Sunday there "never was" evidence that former President Barack Obama — or anyone else — wiretapped Trump Tower during the 2016 presidential campaign.

"If you take the president literally, it didn't happen," Rep. Devin Nunes (R-Calif.) said on "Fox News Sunday." "Was there a physical wiretap of Trump Tower? No, there never was, and the information on Friday continues to lead us in that direction."


Still, Nunes suggested that media revelations that former national security adviser retired Lt. Gen. Michael Flynn had conversations with the Russian ambassador to the U.S. raised concerns with the Trump administration that other people might have been spied on during the campaign.

"If there were other surveillance activities where names were picked up and unmasking occurred, and that was spread throughout the intelligence community, that is very possible and we don't have answers to those questions yet," Nunes said. "I don't know if the president has those or not."

Nunes' comments came ahead of a committee hearing Monday at which FBI Director James Comey and National Security Agency Director Adm. Mike Rogers are set to testify on Russian tampering during the 2016 campaign.

"We're going to highlight the fact that we know the Russians were trying to get involved in our campaign, like they have for many decades," Nunes said.

His committee, he explained, would try to "get to the bottom of" whether the Russians tried to help Trump, "and whether Trump associates or anyone else was involved."