New details about an October poll shows repealing a gay marriage law in Washington would not be easy.

The Washington Poll found that 43 percent of the 938 registered voters surveyed by telephone said gay marriage should be legal, while 22 percent endorsed either civil unions or domestic partnerships for gay and lesbian couples.

But when asked whether they would vote to repeal a gay marriage law if approved by lawmakers, a majority of respondents (55%) said they would not. And another 14 percent either favored repeal not strongly (7%) or were undecided (7%). The survey has a 3.5 percent margin of error.

The results are good news for marriage equality advocates, who on Wednesday gained a powerful new ally in Governor Chris Gregoire. Gregoire has pledged to introduce a bill that would legalize gay marriage in the upcoming legislative session. During a news conference on the announcement, she said that she had struggled with the issue.

Opponents are expected to attempt to repeal the law at the ballot box, if approved by lawmakers.

Currently, Washington recognizes gay and lesbian couples with domestic partnerships.