Donald Trump has said he "very seldom" regrets anything he posts on Twitter, when asked about the volley of tweets he sent two weeks ago accusing Barack Obama of spying on him.
Mr Trump, speaking at a press conference with German Chancellor Angela Merkel, said "at least we have something in common," apparently referring to reports during Obama's presidency that the United States bugged her phone.
Congressional leaders from both political parties say they do not believe Trump was wiretapped.
Mr Trump also deflected criticism about a White House official who on Thursday repeated a charge that a British intelligence agency helped Obama wiretap Trump. Trump said Press Secretary Sean Spicer was merely quoting a Fox News analyst when he made the comments.
Mr Trump's tweets on March 4:
Terrible! Just found out that Obama had my "wires tapped" in Trump Tower just before the victory. Nothing found. This is McCarthyism!— Donald J. Trump (@realDonaldTrump) March 4, 2017
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!— Donald J. Trump (@realDonaldTrump) March 4, 2017
I'd bet a good lawyer could make a great case out of the fact that President Obama was tapping my phones in October, just prior to Election!— Donald J. Trump (@realDonaldTrump) March 4, 2017
How low has President Obama gone to tapp my phones during the very sacred election process. This is Nixon/Watergate. Bad (or sick) guy!— Donald J. Trump (@realDonaldTrump) March 4, 2017