Donald Trump Jr. enjoyed a hunting trip with the Putin-linked Russian oligarch who paid for his lavish Caribbean wedding, it has been revealed. Umar Kremlev, head of the sanctioned and scandal-ridden International Boxing Association (IBA), joined Trump Jr. for a two-day trip to a remote part of western Mongolia in August, where Trump Jr. shot and killed an Altai argali, an endangered horned sheep, the Financial Times reports.