The Scots are generally not fans of Mr. Trump, and protests were already planned for Saturday. A group called “Stop Trump Scotland” said it was organizing a “festival of resistance” against Mr. Trump during the trip and has called on John Swinney, the first minister of Scotland, to cancel plans to meet with him.

IRVINE, Scotland — Lottie Woad had four birdies in a six-hole stretch around the turn and posted a 5-under 67 on Saturday to maintain her two-shot lead in the Women’s Scottish Open as she closes in on victory in her professional debut.