South Dakota Abortion Poll

Here's an AP story on how 800 of South Dakota's registered voters feel about the upcoming vote on the state's abortion ban.
47% currently oppose the ban, 39% are in favor of it and 14% are undecided. The poll then asks how those opposed to the ban and those undecided would vote if the ban included exceptions for rape and incest.

59 percent said they would support it, 29 percent said they would still reject a ban, and 12 percent were undecided.

This means that roughly 2/5 voters from South Dakota favor the ban as is, 1/3 would favor a ban with a rape/incest exception and 1/5 are totally against an abortion ban with or without the exceptions.