What does "maverick" mean in McCain campaign?

It was supposed to mean doing the unexpected thing, or going against the majority and following through on what you believe in - in other words, it meant integrity even when faced with opposition. Here's a profile of John McCain that discusses his past accomplishments and stances on various issues: a href="http://www.findingdulcinea.com/features/multi-day/net-profiles/3-john-mccain.html" rel="nofollow"http://www.findingdulcinea.com/features/…/a