Donald Trump Jr. is scheduled to be in Maine in a few days, campaigning for his father at stops in Lewiston, Auburn and Gray, WCSH-TV reported early Monday. He is the oldest child of Republican presidential nominee Donald Trump. Efforts by the Portland Press Herald to reach the Trump campaign for the details and the exact timing of Trump Jr.’s visit were unsuccessful Sunday night. The candidate has visited Maine four times during the campaign, most recently at a rally in Bangor on Oct.