When a light is shined into the dark corners of American politics, it’s never pleasant to see what scurries away. Last week, a federal judge in Maine unsealed memos from the National Organization for Marriage, one of the most prominent groups fighting against same-sex marriage.

They relate to a case filed over whether the group must disclose the donors that helped underwrite a 2009 ballot initiative that overturned the state’s legalization of same-sex marriage. The group uses its designation as a social welfare organization to avoid federal disclosure, but the memos dispel any notion that the claim has any legitimacy. National Organization for Marriage is a political group, through and through.

The documents brag about its “crucial” role in passage of Proposition 8, California’s ban on same-sex marriage that was overturned by a federal appeals court. They describe the group’s use of “robo-calls” to scare residents in different states away from supporting marriage equality. They talk of a plan to “expose Obama as a social radical,” but the most appalling portions deal with the group’s racially and ethnically divisive strategies.

“The strategic goal of the project is to drive a wedge between gays and blacks — two key Democratic constituencies,” says one memo.