Sen. Susan Collins Susan Margaret CollinsThe Hill's Campaign Report: Biden asks if public can trust vaccine from Trump ahead of Election Day | Oklahoma health officials raised red flags before Trump rally Gideon leads Collins by 12 points in Maine Senate race: poll Senate leaders quash talk of rank-and-file COVID-19 deal MORE (R-Maine) on Sunday said President Trump owes the American people an explanation for his accusations that former President Barack Obama Barack Hussein ObamaThe Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon Trump appointees stymie recommendations to boost minority voting: report Obama's first presidential memoir, 'A Promised Land,' set for November release MORE wiretapped Trump Tower.

“I don’t know the basis for President Trump’s assertion, and that’s what I wish he would explain to us, on the Intelligence Committee and to the American people — and I do believe he owes us that explanation,” Collins told NBC’s “Meet the Press,” when asked if the accusations were true.

Trump, without evidence, earlier this month accused Obama of wiretapping Trump Tower before the November election. A spokesman for Obama denied that the former president or any White House official called for surveillance.

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Rep. Devin Nunes (R-Calif.), who chairs the House Intelligence Committee, on Friday said he was satisfied with the documents provided by the Department of Justice related to the wiretapping allegations. The information contained in the documents was not immediately released.

Collins, who sits on the Senate Select Committee on Intelligence, said Sunday she has not seen any evidence of Trump’s claims.

“I have seen no evidence supporting that statement, and what we need is evidence. If the president has evidence of that, I would encourage him to turn it over to the House and Senate intelligence committee,” she said.