Donald Trump has "no regrets" about accusing his predecessor of wiretapping Trump Tower, the White House press secretary has insisted.

Sean Spicer said that Mr Trump's explosive allegations over the weekend still stood, and that the president would now wait for investigations to run their course.

Asked whether it was not a waste of time and money for congressional and senatorial committees to investigate Mr Trump's baseless allegations, Mr Spicer replied that it was "not about new proof".

The White House press secretary devoted much of his press conference to detailing Monday night's proposal for a new Republican healthcare plan.