A slight antidote to the aggressive show of security was hearing some classics blaring from where the golf caddies were huddled, including Billy Joel’s Uptown Girl, shortly after Mr Trump teed off at about 10am.

Turnberry resort has been transformed into an “American prison”, complete with high fencing and “sniper towers”, for Donald Trump’s visit.

While demonstrations have taken place in Edinburgh and Aberdeen in opposition to the US president's Scotland trip, Turnberry remains a ghost town.

The US President is in Scotland for a four-day private visit, which includes the opening of a second golf course at his Aberdeenshire resort.

President Donald Trump caused a stir with his actions at his Turnberry Golf Club in Scotland on Saturday, appearing to break one of the unwritten rules of the sport