The platform is a broad statement of the party's priorities on the economy, social issues and national defense that's up for approval at the convention.
Scott Dibble, a committee member and a state senator from Minnesota, said support for gay marriage can attract new voters.
"Young people are looking for a political home right now. This has become a defining moral question of our time," said Dibble, who is gay.
The platform says Democrats support "marriage equality" and the "movement to secure equal treatment under law for same-sex couples."
J. Michael Bitzer, a political science and history professor at Catawba College, said Democrats can use the North Carolina vote as "rallying cry for their platform."
"But I think it kinds of sets up an awkwardness that the national Democrats will ratify or solidify their support for marriage equality in a state that recently banned gay marriage," he said
The convention creates an opportunity for more dialogue about same-sex marriage, said the Rev. Jasmine Beach-Ferrar, executive director of the Campaign for Southern Equality. Her group has been organizing the "We Do" campaign which advocates for lesbian, gay, bisexual and transgender people.
"This convention is a way to highlight some of these contentious issues because North Carolina helps illustrates what's going on. It's good to remind people what's going on here," Beach-Ferrar said.
She said it's an important issue. Same-sex couples don't have the same rights as married couples. That complicates issues such as benefits and adoption.
"For me, there's clearly a real urgency on the issue. And I'm eager for us to move beyond the very predictable polarized debate and actually start talking about how real people are being impacted by discriminatory laws and what the solution is," she said.
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