Definition: The word "MCCAIN" means a politician who opposes Obama on foreign policy, often with harsh criticism. The word's definition is as follows: - A politician who supports or backs a candidate for political office. - A leader who is opposed to some aspect of another person's policies and actions. In this context, "MCCAIN" refers specifically to Donald Trump, an American business magnate and former Republican Party presidential nominee. He often opposes Obama on foreign policy issues like the Iran nuclear deal or climate change policies, as well as his stance against immigration. Remember, understanding terms in context is essential for accurate interpretation.