Fox News, for its part, issued a rare public rebuke of legal analyst Andrew Napolitano, the "very talented legal mind" Trump and Spicer cited when making the claim that Britain's GCHQ intelligence agency had spied on Trump Tower after the election.
Speaking on Friday, Theresa May's spokesman said the government had "made clear" to the United States that the "ridiculous" claims should be ignored, and had received assurances in return that they will not be repeated.
In an interview with the New York Times, a former intelligence official who pushed a 2008 rumor that former First Lady Michelle Obama made racially-inflammatory comments about white people in a taped-speech admitted he is one of the sources for President Donald Trump's claim he was "wiretapped".
A Senate committee on Thursday concluded that there were "no indications" Trump Tower was under surveillance by the United States government before or after the election.
"If you look at who does the attacks it isn't the refugee from 5 countries or 7 countries who slipped in unvetted, it is someone in our country...whose an American who grew up in Newark and went to Orlando and who needed an outlet and chose to hate the United States", he told FOX Businesses' Liz Claman. But the story was about intelligence agencies monitoring Russian officials - and how, through that regular surveillance, they may have discovered contacts between those officials and Trump associates.
Federal Bureau of Investigation and National Football League security locate Tom Brady's Super Bowl LI jersey
The report says Brady's Super Bowl XLIX jersey from two years ago was taken by the same person who took the Super Bowl LI jersey. Six weeks also passed since Brady's Super Bowl jersey was stolen by someone in the Patriots locker room.
Tim Farron, leader of the Liberal Democrats - the junior partner in the last British coalition government - said Mr Trump was "compromising the vital UK-US security relationship to try to cover his own embarrassment".
"Well, I've been reading about things", Trump told Carlson. It's the initials for the British Intelligence Spying Agency.
A German official rejected President Trump's claim that it owes North Atlantic Treaty Organisation and the U.S.
When CNN asked him if the White House had apologised, Spicer said: "No, we were just passing on news reports".
Merkel had close relations with Trump's Democratic and Republican predecessors, Barack Obama and George W. Bush, and she is likely to seek a strong working relationship with Trump despite major policy differences and wariness in Germany about the former NY businessman.
Santorum, who supported Trump for president and backs many of his policies, also said it's time for Trump to leave the campaign behind and act like a president.