Similarly, only 24 percent of those surveyed agreed that Congress should "pass a constitutional amendment to ban same-sex marriage in every state regardless of state law." Many leading Republicans, including presumptive GOP presidential nominee Mitt Romney, support such an amendment.
A slightly greater number, 27 percent, said they would support a constitutional amendment to permit same-sex marriage in every state regardless of state law. That's a surprisingly substantial level of interest, given that no elected official--and no prominent gay-rights leader--has seriously proposed such a step.