Trump said he wants abortion up to the states.
The only reason a state would want to ban abortion is if they see it as murder.
But if you think abortion is murder, then you'd want it banned everywhere.
His argument is different entities have their own views on abortion so local entities should make the call. However, the most local government out there is the individual person, so from that perspective, if you're being consistent, then individuals would get to decide if abortion is legal for their own bodies (until the moment of birth, if we're really going to let local entities decide their own policies just like the policy in Alaska). Jennifer might be willing to abort at 29 weeks; Sabrina might be willing to abort until 20 weeks; Emily and Fiona might be a bit more conservative since they go to church; they might ban themselves from allowing abortion to be done to their territory.
The most logical interpretation of Trump's, "leave it up to the states because it's more decentralized" is to decentralize it up to each individual person (and if this means some people will abort late term for whatever reason they want, then so be it).