COPENHAGEN/WASHINGTON—Donald Trump Jr. arrived in Greenland’s capital Nuuk for a private visit on Tuesday, shortly after his father, President-elect Donald Trump, reiterated his interest in the resource-rich Arctic island. Trump Jr. arrived in his father’s “Trump Force One” private plane at about 7:50 a.m. ET, according to a livestream from Nuuk airport and flight tracking websites. The visit to a freezing, snow-covered Nuuk was expected to last four to five hours, and no meetings were scheduled with government officials, a local official told Reuters. “No, I am not buying Greenland,” Trump Jr. said in a podcast on Monday, alluding to his father’s recent comments. “Funny enough, I’m actually going on a very long personal day trip to Greenland.”…