A New Jersey gay couple is suing a group which used their engagement photo in a political attack mailer.

Brian Edwards and Tom Privitere are seen holding hands and sharing a kiss in the photo.

The Virginia-based Public Advocate of the United States used the photo in a mailer to attack Colorado state Senator Jean White, one of a handful of Republicans who supported civil unions this year. The group replaced the photo's Manhattan skyline backdrop with a snowy background to represent Colorado and added the caption: “State Senator Jean White's idea of 'Family Values?'”

White told DCist that she believes the mailers were “solely responsible for my defeat” in the June GOP primary.

Public Advocate is by headed Eugene Delgaudio, a member of the Loudoun County Board of Supervisors.

The Southern Poverty Law Center (SPLC), which is representing the couple, issued Public Advocate a cease-and-desist letter in July and now plans to file a lawsuit in U.S District Court for Colorado.

“Public Advocate, a group identified as a hate group by the SPLC, used the couple's personal engagement photo without permission and altered the image to include anti-gay propaganda to attack Colorado state lawmakers including Sen. Jean White, who supported Colorado's civil union legislation,” the SPLC said in a statement.