It started appearing in parts of the press later yesterday - headlines along the lines of "Trump accepts King Charles' invitation to join Commonwealth". (as associate)
Problem is, there is no evidence from the Palace or Downing Street an invitation has ever been issued
Press this morning headlines
DM "Exposed: Secret offer King Charles is planning to make to Donald Trump that would make America ROYAL again"
FT "Trump says he would be happy for US to become ‘associate’ Commonwealth member
US president posted Sun news story that referred to a supposed ‘secret offer’ King Charles is due to extend"
Times "Trump embraces rumour of US joining Commonwealth: ‘I love King Charles’
Suggestions that Britain will invite America to be an associate member of the group of nations have been welcomed by the president"
An article in Yahoo seems to give a hint about tis origin
A member of the Royal Commonwealth Society told the Mail that the possibility of America making entry into the Commonwealth is “being discussed at the highest levels” as “a wonderful move that would symbolize Britain's close relationship with the U.S
“Donald Trump loves Britain and has great respect for the Royal Family, so we believe he would see the benefits of this. Associate membership could, hopefully, be followed by full membership, making the Commonwealth even more important as a global organization,” the person added.
My immediate reaction was "this is a fake" and a nasty one at that, what about Canada.
No comment whatsoever on th story from the Palace or Downing Street, personally I think its bad to publish rumours as unfounded as this.