In a series of four early morning tweets last Saturday, Mr Trump said Mr Obama had been "wire tapping" his NY offices and suggested that the former president had meddled with the "very sacred election process".
A spokesman for Obama denied that the former president, or any other White House official, had ordered surveillance on a private USA citizen.
Although President Trump's accusation Obama had his "wires tapped" in Trump Tower during the 2016 presidential election represented and explosive allegation, the president did not elaborate on the source of his information nor did he cite any evidence to support his claim.
"A cardinal rule of the Obama Administration was that no White House official interfered with any independent investigation led by the Department of Justice".
Another White House spokeswoman, Sarah Huckabee Sanders, would not say on ABC's "This Week" program on Sunday whether the contentions about the wire tapping - which an Obama spokesman has denied - were true. Trump wrote. He added: "Just out: The same Russian Ambassador that met Jeff Sessions visited the Obama White House 22 times, and 4 times a year ago alone". She said the committee may ask the president to release his tax returns, which the president so far has refused to do, if the evidence suggests those documents would be helpful in the investigation.
He tweeted a series of accusations Saturday morning (March 4) without citing any evidence, causing news outlets to scramble to report the shocking claim.
US President Donald Trump levelled that claim on Saturday when he accused his predecessor of tapping telephones at Trump Tower. "Nothing found. This is McCarthyism", Trump wrote in one tweet Saturday. Attorney General Jeff Sessions is now under attack for failing to mention his meetings with the Russian ambassador during his confirmation hearing. "You can't just go around and tap buildings", the official said.
The Times reports that Trump's claims were met with skepticism even by Republicans.
Obama's foreign policy advisor, Ben Rhodes fired back tweets and said, "No President can order a wiretap".