Answer:
First he starts by getting Gatsby angry, mocking how he regularly calls people old sport. Then, he accuses him of not going to Oxford, which Gatsby denies. After a short quarrel about who between them is loved by Daisy, Tom accuses Gatsby of being a bootlegger. This causes Daisy to shift further away from Gatsby and closer to Tom. It should be considered that daisy is into richer men, and probably moves towards Tom for that fact.