Nonpartisan commission?

Why do I keep seeing the Commission on Presidential Debates referred to as "nonpartisan," even though it's 100 percent composed of Democrats and Republicans? If it had been allowed to impose its current rules on the debates for the Minnesota governor's race, it would have kept Jesse Ventura out! Now that the commission has seen what happens when the public is allowed to hear an alternative to the Democrats and Republicans, it is clearly determined to make sure that it doesn't happen again.

Bradley Bobbs
Van Nuys