nonpartisan

adj

1. (not-comparable)Not partisan; impartial and unbiased.

   “This means Gore will have to stop dancing away from the question as if the pardon decision were somehow shared with the pardonee. It's time he chose the hard right over the easy wrong answer. (For Bush, it would be an opportunity to demonstrate nonpartisan compassion on a grand scale.)”

noun

1. One who is not a partisan.
2. A person who has not selected or declared a side or party.

   ““The first thing is that nonpartisans as a group are occasional voters,” Mr. DiCamillo said. “They are not as engaged in politics. They view the parties as being too partisan and migrated to nonpartisan.””