(NBC News)- Donald Trump alleged in a tweet storm early Saturday that former President Barack Obama had wiretapped Trump Tower before his election victory.
Trump did not provide any evidence for the claims, which followed an interview on Fox News where the allegations came up.
“Terrible! Just found out that Obama had my “wires tapped” in Trump Tower just before the victory. Nothing found. This is McCarthyism!” Trump wrote as part of a series of tweets Saturday morning.
He added: “Is it legal for a sitting President to be “wire tapping” a race for president prior to an election? Turned down by court earlier. A NEW LOW!”
NBC News reached out to former Obama administration officials and the White House for comment and clarification but had not heard back.
On Friday, Fox’s Brett Baier asked House Speaker Paul Ryan whether he was concerned “that the Obama Administration may have been surveilling members of the Trump campaign in a pretty detailed investigation during the election?”
Ryan responded by saying: “I don’t think that’s the case.”
Trump’s campaign offices were located in Trump Tower in Manhattan and the Trump family has a multi-floor residence in the building.
Trump frequently tweets about topics that have appeared on conservative media outlets.
The allegations were part of a flurry of early morning tweets that also defended Attorney General Jeff Sessions.
Sessions is under fire for not disclosing during his confirmation hearing that he met with Russian Ambassador Sergey Kislyak. Sessions was a senator at the time and an adviser to the Trump campaign.
“The first meeting Jeff Sessions had with the Russian Amb was set up by the Obama Administration under education program for 100 Ambs……”
“The same Russian Ambassador that met Jeff Sessions visited the Obama White House 22 times, and 4 times last year alone.”
News of the meetings drew fire from critics who said Sessions had misled the Judiciary Committee in his January confirmation hearings.
On Feb. 13, National Security Adviser Michael Flynn resigned just after the Washington Post first reported that the Justice Department had informed the White House that Flynn could be subject to blackmail.