NEW YORK—"There is a limit to how much can be raised," Schubert said. "When you are spread this thin, it is very difficult."
He said he believes the group is fighting head winds politically this year. He described all four states with referendums as "deep blue" and expected to support Obama in the fall. "These are tough places to fight," he said.
Conversely, gay marriage supporters say they are seeing a groundswell of people who want to be involved, and think there is a path to victory. "Now there are more people who see [upholding such laws] as realistic," said Mark Solomon, who has raised money for same-sex marriage campaigns for the past 10 years.
The first official peek at each side's donors to the Maryland campaign will come in reports due Oct. 12, though opponents had to give some hints about their funding sources in the spring when they launched their effort to trigger the referendum.
Papers filed with the state Board of Elections showed that two-thirds of their roughly 600 checks came from out-of-state, most from small donors.
When contacted by a reporter, several said they gave because of a broad-based Internet appeal to defeat same-sex marriage laws nationally. "I just believe in the cause where ever it is," said Dianne Graham of Coggon, Iowa, who was listed as donating $6.50 to the Maryland effort.
Graham, who was reached by telephone, said she donated $25 online — and received receipts showing the gift was split among the four different states. "I would presume it is going to all of the places where they are voting on this issue," Graham said.