President Donald Trump’s accusations that former President Barack Obama wiretapped Trump Tower for political reasons were "very reckless," Senate Intelligence Committee Vice Chairman Mark Warner told CBS's "Face the Nation" on Sunday.
"I thought the president's comments could no longer surprise me, but boy this one yesterday surprised me," said Warner, a Democratic Senator from Virginia. "To make that type of claim without any evidence is I think very reckless."
Warner said he was unaware of any FISA court order regarding Trump Tower, which Trump said was under a wiretap during the presidential campaign.
The senator added that Trump’s tweets showed the president "doesn't understand how you obtain a wiretap. You have to go before a judge and show either probable cause, or if it's in terms of foreign intelligence, a FISA court, and show that there is evidence of some type of contact with a foreign adversary."
Republican Sen. Susan Collins, who is a member of the Intelligence Committee, told CBS that she has seen "no evidence of what [Trump has] alleged," adding that "It would probably be helpful if he gave more information, but it also might be helpful if he just didn’t comment further and allowed us to do our work."
Both Warner and Collins said they were confident the committee would uncover the truth in a bipartisan and independent manner.
"There's nothing I've done in my life in public that's as important as trying to getting this investigation done right and bipartisan, and get the facts out to the American people," Warner said, who added that he is convinced that Republicans on the committee are as committed as he is to get to the bottom of what is happening.
Collins said she is certain the committee will do "the kind of exhaustive, in-depth and prompt investigation that will help put these allegations to rest one way or another."
She added that senators will also be prepared, if necessary, to ask for Trump’s tax returns, which he has so far refused to release.
"We'll go wherever the evidence leads us and ... will get all of the information we need," Collins said. "If that includes President Trump's tax returns then I have confidence that we will ask for them. If we don’t need them in order to reach our conclusions then we won't."
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