Just in case you were wondering about his political acumen and judgment, check out this quote from 1973 about Watergate:
Well, here's what McCain said (about Nixon and Watergate) at the time, according to the book that I'm currently reading entitled Man of the People: The Life of John McCain by Paul Alexander, pp. 81-82:
Finally, in the article, McCain discussed the major political story that had unfolded since he had returned: the controversy that had surrounded President Nixon as a result of the Watergate scandal. "It has certainly made me sad that this situation should have arisen," McCain said about the man who had welcomed him home only a few months earlier. "However, I feel that, in the context of history, Watergate will be a very minor item as compared with the other achievements of this Administration, particularly in the area of foreign affairs. I do hope that this country will get over Watergate and get going again on the very serious problems that we're facing today." Clearly, McCain had misjudged the impact that would come from Watergate and how it would define, for at least the remainder of the twentieth century, Nixon's presidency.
Puts a whole new spin on his "third George W. Bush term" strategy, doesn't it?