Why hasn't the abortion issue ever made it on the ballot as a referendum to be voted on by the public?
Still not getting any eh Arnold?
For the same reason that the Massachusetts Legislature kept Gay Marriage off the ballot. The truth about the actual number of Pro-Lifers would put the lie to the Most Americans are Pro-Choice shpiel.
Why hasn't the abortion issue ever made it on the ballot as a referendum to be voted on by the public?
Good point.
Since we are a United State democracy Vs the former Constitutional Republic known as the United States - why not?
Because you would lose in a landslide.
Because thanks to liberal legislation created by the Supreme Court, the only process that might change things would be a Constitutional Amendment. A few have been started, but amending the federal constitution is a Herculean process.