Read as much as you want on BostonGlobe.com, anywhere and anytime, for just 99¢.

Document gains GOP support

More than two dozen Republicans — including a top adviser to Mitt Romney, the 2012 Republican presidential nominee, and a former congresswoman who made banning same-sex marriage her signature issue — have added their names to a legal brief urging the Supreme Court to declare that gay couples have a constitutional right to wed.

The brief comes as the White House is considering whether to weigh in on the same-sex marriage case.

Continue reading below

At this point, the Republicans who signed the document are taking a more expansive stance than President Obama, who favors same-sex marriage but has said he would leave it to the states, as opposed to making it a constitutional right.

The list of Republicans on the brief now tallies more 100, organizers say.

It now includes Beth Myers, who ran Romney’s 2008 campaign and was a senior adviser to him in 2012. Also on the list is Marilyn Musgrave, a retired Colorado congresswoman who was once rated the most conservative member of the House by the American Conservative Union.

Musgrave, who lost her bid for a fourth term in 2008, once warned that if gay couples were allowed to wed, ‘‘the next step is polygamy or group marriage.’’

Loading comments...

You have reached the limit of 5 free articles in a month

Stay informed with unlimited access to Boston’s trusted news source.

  • High-quality journalism from the region’s largest newsroom
  • Convenient access across all of your devices
  • Today’s Headlines daily newsletter
  • Subscriber-only access to exclusive offers, events, contests, eBooks, and more
  • Less than 25¢ a week