http://www.boston.com/news/nation/articles/2008/03/09/alcohol_industry_ties_may_test_mccain/?page=2

Some would say that John McCain's opinion on the issue of the legal drinking age is biased due to his ties with the Anheuser-Busch company and distribution plant. His wife is chairwoman of the board, his son is the company's chief financial officer, and even McCain himself served as the chief publicist. George Hacker, director of the alcohol policies project at the Center for Science in the Public Interest, fears that federal regulators might become aware of McCain's industry ties and therefore go easy on beer distributors. McCain originally claimed that he was divided on the issue of lowering the drinking age. He brought up the fact that people can fight for their country at 18 but can't drink legally until 21. Like Obama, McCain now feels that the drinking age should remain at 21.