I respectfully disagree.
Remember, the people did not legalize abortion, and it is therefore not their hearts that must change.
In comparison to slavery, abortion will be much simpler to "un-legalize," since it exists only by virtue of judicial lunacy rather than actual law. Involving the states in this question is both unnecessary and unconstitutional.
We are united states for the purposes outlined in the Preamble. What we need is an executive who understands that fact, the way Lincoln understood it.
But 71% of Americans want abortion kept legal in some form.
I assume this means that you want the President to issue an EO banning abortions nationwide.
(please restate if I'm wrong)
Is there any recognized Presidential candidate who is committed to doing this? Would you vote only for such a candidate?