David Milne, whose property overlooks the golf course, told the Associated Press he will mark Trump’s visit by flying the Mexican national flag over his house within sight of the clubhouse.
Trump is spending the weekend at his Turnberry property as he prepares for a high-stakes summit with Russian President Vladimir Putin in Helsinki on Monday.
This comes on the heels of his visit to England for several meetings, including tea with Queen Elizabeth II.
Trump has a long-professed adoration of Scotland; his mother was born in Stoneway.
He owns two championship-level golf resorts in the country, including the seaside Turnberry resort.