hillary clinton once supported a constitutional amendment to restrict abortion rights. i don't think she ever reversed herself on that, either.
but, the democrats are running on abortion.
joe biden's response to the end of abortion rights, as president, was to tell people they should elect somebody that would stand up for their rights, and legislate abortion rights. not him, though, apparently. in fact, he nominated anti-abortion judges.
but, the democrats are running on abortion. they'll get lots of votes, too. so, why would they change anything, if they're getting lots of votes? it's a perennial vote driver.
there are lots of issues where the democrats have a history of being confusing or breaking promises, and this is one of the worst. if abortion is your ballot issue, be careful who you're voting for. you might not get what you're expecting.