.... that anti-abortion legislation can be passed at the federal level is unrealistic. A clear majority of Americans support Roe v. Wade.

The most probable scenario is one where a handful of states pass laws criminalizing abortion. I do not disagree that the scenario you depicted will play out in these states. However, this nightmare will be limited to these states. Yet women (a small percentage, no doubt) can still cross state lines to get an abortion. Then, states banning abortion can do one of three things:

• Keep the ban without punishing women who cross state lines to get an abortion.
  
• Keep the ban and prosecute women who cross state lines to get an abortion.
  
• Life the ban altogether.

I think we can both agree that option #1 and option #3 are highly unlikely. The only way these states can clamp down on the few women who cross state lines to get an abortion is by throwing them in jail.

Even if you disagree with every letter of every word or every sentence I have written, you have got to see that NARAL is fumbling around with much of a clue.