I looked this up in light of the increased chances the Supreme Court will overturn or cripple abortion rights.
Support for Roe v. Wade hits an all-time high
This article from July 2018 states:
“A new poll from NBC News and the Wall Street Journal finds that 71 percent of American voters believe that the decision, which established a woman’s legal right to an abortion, should not be overturned. Just 23 percent say the ruling should be reversed.”