The election year makes a great backdrop for teaching lessons of citizenry. Take a look through your badge work for activities that may work well this fall. If you are really interested and you have a Girl Scout troop consider looking into the Girl Scouts of Eastern Massachusetts badge program called "I Promised A Girl Scout I'd Vote" - the patch can be ordered through their online shop. For more ideas check out the badge work for the Election Connection and the Right To Vote programs.
Consider contacting the local brand of your states League of Woman Voters and have a guest speaker.
Also check out how Girl Scout Troop 2447 incorporated voting into their meetings. They learned about elections, set out to make voting booths and ballot boxes to voice their opinion on their holiday party.