They say public opinion on abortion has generally reversed itself compared to when it was most approved, so it is possible. But in my opinion, when one looks at the popular votes in the ‘gay marriage’ amendments, where they passed, when they passed and by how much, the trend doesn’t seem to positive. They have a fantastic success rate, but you still have to consider the issue wasn’t even around 30 years ago. There are some states that barely passed them a few years ago, I wonder if they would pass now.
They have never yet had a referendum where the people voted in favor of gay marriage. Even California voted against it.
That's why they're trying so hard in WA and MD this November. They need at least one success in a referendum so they can say, "See? The people are in favor of it."
(I'm giving money to the Washington State effort to stop them. I don't live there but I don't want them to get even one referendum in their column.)