Support for gay marriage among African-American voters in Nevada has increased 26 percentage points since President Barack Obama announced in May that he supports such unions.

According to Public Policy Polling, only 21 percent of black voters in the state previously favored legalizing gay marriage. Forty-seven percent of respondents to a poll released Tuesday said they approve of such unions; 42 percent said they remain opposed.

The pollster previously found similar increases among black voters in North Carolina, Pennsylvania and Ohio.

“We've now found in both North Carolina and Pennsylvania that black voters have moved more toward support of gay marriage in the wake of Barack Obama's announcement,” said Dean Debnam, president of Public Policy Polling. “The media's been asking the wrong question – the big issues isn't how Obama's stance will affect his reelection hopes. It's how Obama's stance will move public opinion on gay marriage.”

Overall, 47 percent of Nevada voters think gay marriage should be legal to 42 percent who think it should be illegal. Eighty percent support either marriage (40%) or civil unions (40%) for gay and lesbian couples. Seventeen percent say there should be no legal recognition of a gay couple's relationship.