On Tuesday, state lawmakers in Vermont legalized gay marriage by overriding the veto of Republican Gov. Jim Douglas. How did the veto happen when the bill barely passed in the first place? How significant is it that the law changed through the legislative process rather than an activist court? What is the gay movement agenda in the next three years? Why are states without constitutional amendments defining marriage legally vulnerable? And how significant is the District of Columbia’s decision to recognize gay marriages performed in the four states where it’s legal.