This is a Republic, not a democracy. We do not vote on issues in this nation, we vote for people to vote on those issues, which I'm sure you're well aware of.
Abortion should be a state issue; the SCOTUS stripped it and took it to a federal level using that oddly unwritten privacy clause. Eventually it might return to a state issue and if your state is a democracy, you'll have the ability to vote on the issue.
At least, that's the way our Founding Fathers intended it. Where is abortion mentioned in The Constitution?