Vermont has become the fourth state in the nation to legalize gay marriage. And this time, it wasn't done by a court, but by the state's legislature. It overrode a veto by its bigoted governor. The legislature's move makes gay marriage an even stronger institution in Vermont than in Iowa, where it won approval last week by that state's Supreme Court in a sweeping unanimous decision. California gay marriage activists now have a clear road if the state Supreme Court upholds Prop. 8 as expected, then they have to mount another ballot measure campaign. It's clear that the tide of discrimination against gays is finally turning.