Related Clues:

• Enemies
• Oppositionists
• They're not on your side
• Paul Newman, on a Nixon list
• Dangerous kind of fire
• Duel personalities?
• They're hostile to you
• They just say 'no'
• ___ forces
• Us and them, maybe
• Forces
• Opposite camp
• Pros' foes
• Traitor, e.g.
• __ lines