Who is Donald Trump Jr and why is he compared to Fredo Corleone in The Godfather?

Donald Trump Jr has long been the brawler who has helped fuel the president's pugilistic instincts and stood firm as one of his fiercest defenders. Now the president's eldest son is at the centre of the firestorm over Russian connections swirling around his father's administration and trying to fight off charges that he was open to colluding with Moscow to defeat Hillary Clinton. Offered Russian help in defeating Hillary Clinton last year, Don Jr jumped at the offer: "I love it," he emailed....