So, we've already heard that Iowa-based homophobe Bob Vander Plaats and his merry group of anti-gay social conservatives, The Family Leader, are asking Republican presidential candidates to pledge allegiance to a document called The Marriage Vow: A Declaration of Dependence Upon Marriage and Family.

And, yes, we all knew they would include a vow against marriage equality, but the document is far more disturbing than imagined.

In addition to asking candidates to agree that our Founding Fathers, Natural law, Christianity and Judaism – but not Islam — are rooted in "faithful monogamy," the questionable claim that marriage leads to longer, healthier lives, and the idea "robust childbearing" bolsters national security, the document also demands candidates agree that homosexuality is a choice, rather than a biological trait.

Social protections…have been evaporating as we have collectively ‘debased the currency' of marriage…in complete absence of empirical proof, that non-heterosexual inclination are genetically determined, irresistible and akin to innate traits like race, gender and eye color; as well as anti-scientific bias which holds, against all empirical evidence, that homosexual behavior in particular, and sexual promiscuity in general, optimizes individual or public health.

While surely Republican candidates want to woo social conservatives, I would be surprised if they all signed up to support such a spurious contention. That doesn't mean, however, that they won't…

Here's a PDF of the document. It's pretty vile.