The people who support the anti-CFR ads can live anywhere in the world they choose. However, if they're asked to contribute $20 each to make the ad a reality, they MUST be American citizens.
I write a constitutional analysis once a month for the American Civil Rights Union. (Do not misread that as ACLU; it's nearly the polar opposite of them.) My next one will be on the McConnell decision. Normally, I don't reference those reports on the Internet to my friends on FR, because they are mind-numbing in their legalisms. This one, however, I will excerpt and post here for your interest, and all others.
Congressman Billybob