That was only because he was president during Nixon's death. When any president dies, the current president should be a speaker at the funeral, same party or not. Other speakers should obviously be those who were friends and family. Neither Clinton nor Carter falls under these categories, so they shouldn't speak - nothing partisan about it.
The above quote...if correct, x42 is the one trying to make the event partisan. And of course, we're not surprised!
Clinton should not speak because he is a self-absorbed jerkoff. And there is REALLY nothing partisan about that.