As same-sex marriage supporters celebrate victories in Washington and Maryland this month, they are keeping a wary eye on New Hampshire, where lawmakers may soon vote to repeal the state’s two-year-old law allowing gay couples to wed.

A repeal bill appears to have a good chance of passing in the State House and Senate, which are both controlled by Republicans. The bigger question is whether they can muster enough votes to overcome a promised veto from Gov. John Lynch, a Democrat.

Based on party lines, House and Senate Republicans both have veto-proof majorities. But this is an issue where party allegiance gets muddy.

In a state whose “Live Free or Die” motto figures into many a policy decision, even many opponents of same-sex marriage wish the issue would just disappear. Republican lawmakers with libertarian leanings, a sizable group, seem especially unhappy to be facing a repeal vote, as well as those who maintain that cutting spending should be the legislature’s sole concern. Both groups appear worried about a backlash from their constituents.