The House Oversight committee chairman says he has not seen any evidence to back President Trump’s claim that the Obama administration wiretapped Trump Tower and eavesdropped on the president’s phone calls during the 2016 election.

“I'm going to keep my eyes wide open, you never know when you turn a corner what you may or may not see,” Rep. Jason Chaffetz Jason ChaffetzThe myth of the conservative bestseller Elijah Cummings, Democratic chairman and powerful Trump critic, dies at 68 House Oversight panel demands DeVos turn over personal email records MORE (R-Utah) said on “CBS This Morning.” “But thus far I have not seen anything directly that would support what the president has said."

Chaffetz pointed out, however, that the president may have access to information that lawmakers haven’t seen.

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“The president has at his fingertips tens of billions of dollars in intelligence apparatus,” Chaffetz said. “I’ve got to believe — I think he might have something there, but if not, we're going to find out.”

The White House has asked Congress to investigate the president’s claims that former President Obama tapped phone lines in Trump Tower during last year’s campaign to spy on the now-commander in chief.

Over the weekend, two Republican senators on the Intelligence Committee, Marco Rubio Marco Antonio RubioHillicon Valley: DOJ indicts Chinese, Malaysian hackers accused of targeting over 100 organizations | GOP senators raise concerns over Oracle-TikTok deal | QAnon awareness jumps in new poll Intelligence chief says Congress will get some in-person election security briefings Republican Senators raise concerns over Oracle-TikTok deal MORE (Fla.) and Tom Cotton Tom Bryant CottonLoeffler calls for hearing in wake of Netflix's 'Cuties' Health care in the crosshairs with new Trump Supreme Court list Cruz says he wouldn't accept Supreme Court nomination MORE (Ark.), similarly said they had not seen any evidence to back up the president’s claim.

However, Cotton said the committee, which is undertaking an investigation into Russian meddling in the U.S. election, would look into the president's claims.

The House Intelligence Committee, chaired by Rep. Devin Nunes (R-Calif.), will also be investigating, and Chaffetz said Oversight “will play a supporting role” in that process.

Over the weekend, Obama’s former director of national intelligence, James Clapper, said he has seen no evidence to support Trump’s claims.

FBI Director James Comey is reportedly furious over the allegations and has asked the Justice Department to refute them.

Chaffetz said Monday that he reached out to Comey but has not heard back.

“I think it’s interesting the Department of Justice has not yet weighed in on this,” Chaffetz said. “I look forward to what they have to say.”

The White House is standing behind Trump’s claims, which they say play to a deeper truth about the intelligence community and holdovers from the Obama era being out to undermine Trump through leaks and other means.

Some Republicans have defended Trump, saying that while Obama could not have ordered a wire tap directly, that it is possible his Justice Department sought a court order to monitor Trump's phone calls as part of an investigation into whether Trump and his aides had inappropriate contact with Russian officials during the campaign.