And a follow up is, would the Trump administration use the Comstock Act to ban all abortions?

"Since the Comstock Act is already federal law, Trump could conceivably use it as the basis for an executive action that bans or restricts abortion on day one of his presidency, without the need for any congressional approval. A Trump-appointed attorney general could also issue guidance authorizing going after abortion providers under the law. “All it takes is an administrative decision from the Department of Justice that they are going to go after people for violating Comstock,” Drexel University law professor David Cohen told BBC News. “The friction involved is very low, other than winning an election.” While the former president has been cagey on his views about abortion and has chastised other Republicans for going too far in endorsing strict bans—given most Americans favor the procedure being legal—both pro- and anti-abortion rights activists cited by The New York Times believe a future President Trump would ultimately listen to advisors and conservative activists who push him to take harsher action."