I saw a link this morning to this article at Esquire.com called "10 Protest Songs to Remember Richard Nixon", marking the 40th anniversary of his resignation. It starts out well with an overlooked Stevie Wonder song and the obvious Crosby, Stills, Nash and Young one before going off the rails with Elton John's nostalgia piece for his early career and a love song to George Wallace which happens to mention Watergate in passing. (I'll even admit the James Taylor one isn't half bad).
