Oppostion Leaders

#8 of our Curious Conundrums series.

Don & Marti constructed this puzzle. Marti said "Rich liked the idea, but had done a similar one before, so he couldn't take our version".

I don't recall such a gimmick. I found the theme unique and refreshing. Heavy theme content & amazing symmetry. Tricky too. Hope you enjoy the challenge.

Puzzle:

Here is PDF (click on File, then Download).

Here is puz file (click on Download).

Spoiler: Here is the answer grid.

Thanks for solving, and we look forward to your comments.

C.C.