BOWIE, Md. — Irene Huskens has the wedding venue picked out: a charming bed-and-breakfast in southern Maryland. But the wedding is no sure thing.
The plans made by Huskens, a 43-year-old police captain, and her partner, Leia Burks, hinge on whether Maryland residents make history Nov. 6 by voting to legalize same-sex marriage.
Huskens is loath to consider the possibility that the referendum question will be defeated.
‘‘There are a lot of Marylanders who want to set the precedent of equality who will vote from their gut for fairness,’’ she said at her home in Prince George’s County, where she and Burks are raising two adopted children.
Starting in 1998, 32 states have held votes on same-sex marriage, and all 32 have opposed it. Maryland is one of four states with Nov. 6 referendums on the issue — and gay-marriage advocates believe there’s a strong chance the streak will be broken.
In Maryland, Maine, and Washington, it’s an up-or-down vote on legalizing same-sex marriage. In Minnesota, there’s a measure to place a ban on gay marriage in the state constitution, as 30 other states have done previously.
Groups supporting same-sex marriage, which has been legalized by court rulings or legislative votes in six states and the District of Columbia, are donating millions of dollars to the four campaigns. They’re hoping for at least one victory to deprive their foes of the potent argument that gay marriage has never prevailed at the ballot box.
‘‘Our opposition uses this talking point with elected officials and in courtrooms,’’ said Chad Griffin, president of the Human Rights Campaign. The national gay-rights group is contributing more than $4.4 million to the four state campaigns.
‘‘If we’re able to win one of these four, it will be a narrative change — proof that the public has moved our way dramatically,’’ said Griffin.
Opponents of gay marriage expect to be outspent in the four states, perhaps by more than 2-to-1 overall, yet they remain hopeful their winning streak can be preserved.
‘‘We definitely can win all four if we can increase the fund-raising,’’ said Brian Brown of the National Organization for Marriage, which has pumped more than $2 million into the campaigns against gay marriage. Its TV advertising is just beginning, including in the expensive markets that reach Maryland voters in the Washington suburbs.
‘‘We do have a big hill to climb to be able to effectively communicate our message,’’ Brown said. ‘‘But we don’t need to match the other side — we win repeatedly while being outspent.’’
All four states are expected to be carried in November by President Obama, who came out in support of same-sex marriage this year.
In Maryland, as in Maine and Washington, the most recent polls show a lead for the supporters of same-sex marriage.