Bear in mind, Trump has already rescheduled a state visit to the UK leery of the reception he's gonna get from British people, whose attitude towards him could be described as "lukewarm" at best This sort of thing most certainly won't help.
Apparently this was caused by the local policeman being from the UK and he'd been going round using the term for years and the locals had interpreted it as something nice.
(I got asked this very question by an American relation a few years back.)