LOUISVILLE, KY. (Reuters) - Democratic presidential candidate John Kerry warned his political opponents on Monday against attacking his outspoken wife, Teresa Heinz Kerry, saying, "They're going to have to go through me." The Massachusetts senator also sought to dispel the notion he was aloof, asking one television interviewer: "Have you had a beer with me yet? I like to have fun as much as the next person, and go out and hack around and have a good time." Worth an estimated $500 million, born in Mozambique and fluent in five languages, Mrs. Kerry can be controversial and blunt, disclosing her...