I like the square orientation of the letters, and really like the shade of green you chose. However, it is important to include an "s" hanging off PAC, as PACs is plural, and the objective of the organization is to get rid of them. Can you make something more square, including the "S", and perhaps with serif as well as sans serif fonts? Can you perhaps use the dark shade of green you used for the overlapping parts as a border around a square containing the letters?
Redesign using little dark green and adding the "S" as a dollar sign. But still using a circle with serif font and adding a square outside. Hope you like it.
Please feel free to contact me if you need anything else.