5th March, 2017
Republican Senator Ben Sasse said Mr Trump’s comments were “serious” and he should explain the alleged wire-tapping and how he came to know about it. The Republican president has supplied no details to back his words.
An Obama spokesman said he had never ordered surveillance of any US citizen. Under US law, wire-tapping can only be approved if there is probable cause to believe that the target is an agent of a foreign power.
Mr Trump, who has been facing intense scrutiny over alleged Russian interference in support of his election campaign, made the allegation on Saturday.
He tweeted: “Terrible! Just found out Obama had my ‘wires tapped’ in Trump Tower just before the victory. Nothing found.
This is McCarthyism!”