"The FBI director has now confirmed what members from both parties in both the House and the Senate have said: President Obama did not order a wiretap on Trump Tower," Schumer said in a statement. "President Trump owes the American people and President Obama more than just an explanation, but an apology."
FBI Director James Comey on Monday said he had "no information" to support Trump's unsubstantiated claims.
"I have no information that supports those tweets, and we looked carefully inside the FBI," he told the House Intelligence Committee. "The Department of Justice has asked me to share with you that the answers are the same for the Department of Justice and all its components. The Department has no information that supports those tweets."
Schumer said that Trump "severely damaged his credibility" with the claims.
"He needs to retract his claim immediately," Schumer said. "No matter what else happened, there are no ifs, ands, or buts about it – President Obama wiretapping Trump Tower did not happen."
Schumer called for Trump to "admit he was wrong, stop the outlandish Tweets, and get to work on behalf of this country."