This may surprise you, but then, maybe not. I remember that Rick Santorum signed this months ago. It appears he is still the only candidate to sign it.

From Christian Post:

As perceived attacks on religious freedom in the U.S. and the very real persecution of believers in the rest of the world have taken center stage recently, it’s more important than ever to know where the nation’s presidential candidates stand on basic human rights, said the president of Open Doors USA.

Carl A. Moeller, whose organization provides support to persecuted Christians in 60 countries, told The Christian Post that while most people would assume that religious liberty is a basic right that presidential hopefuls could easily get behind, a Presidential Pledge for Religious Freedom he co-authored has been signed by only one candidate, Rick Santorum.

I’d say the attacks on religious freedom here in the U.S. are more than “perceived” but are indeed very real. Catholic bishops don’t threaten to close hospitals for no good reason. Rick Santorum not only has signed the religious freedom pledge, he stands for religious freedom both here at home and overseas.