I saw a bumper sticker yesterday on a minivan that just said "Not Republican" overlaying pastelly red, white, and blue stripes. Specifically, the shades of red and blue used by OFA.

In response, here's draft 1:
Click image for larger version.  Name: Not_D1.png  Views: 129  Size: 73.1 KB  ID: 53211
and draft 2:
Click image for larger version.  Name: Not_D2.png  Views: 119  Size: 63.7 KB  ID: 53213