Bishop Harry Jackson is pretty much everywhere when it comes to fighting marriage equality in the District. If he’s not filing (unsuccessful) legal challenges the city for turning down one of his requests for a vote on the definition of marriage, he’s submitting another request for another vote. If he’s not hosting a “National Marriage Summit” on the Hill, he’s penning a letter to Congress outlining the reasons it should force the city to put same-sex marriage on the ballot.

The new letter, which was co-authored by a number of other religious figures who refer to themselves as “moral and cultural watchmen,” lays out a number of reasons why Congress should get involved in the District’s fight for marriage equality. One reason they cite is 1996’s Defense of Marriage Act, which prohibits the federal government from recognizing same-sex marriages. According to the letter, “If the recent DC same sex-marriage law is allowed to stand, people around the nation will ask, ‘Why did Congress allow the city to violate the Defense of Marriage Act (DOMA)?'” This argument, which isn’t new, claims that since the District is a federal dependency, it is a bound by the terms of DOMA.

Jackson and his co-authors also resort to thinly-veiled threats, noting, “A danger for both parties would be to write us off as being doctrinaire, impractical, or out of touch with their respective political bases.” If Congress does not act, they write, “there will be political consequences to pay.” (Jackson and his allies have resorted to these threats twice before.)