John McCain is no longer a substantively important figure in American politics. As a member of the minority party in the Senate, he chairs no committees. He is not a leader among his peers. Since losing in his second run for president, he continued his decades-long record of not bothering to engage in the legislating part of being a legislator (over a three-decade-long career, McCain has exactly one significant piece of legislation to his name, a law that was overturned by the Supreme Court). Yet he continues to be a politically important figure, appearing more often on the Sunday shows than anyone else and having his ideas and his opinions regularly reported on.
Which is why I simply must speak up now that the biggest myth about John McCain is cropping up again. It's the idea that, noble and modest as he is, McCain has always been terribly reluctant to discuss the fact that he was a POW in Vietnam.