Indiana in 1851 and Illinois in 1853 did enact legislation barring the immigration of any black. In part to reassure the South by denying sanctuary to fugitive slaves. Three-fifths of the country's border between free and slave states ran along the southern boundaries of these states. A large support of this legislation came from "Butternuts"... those from the south who had settled these regions. Ohio repealed it's Negro exclusion acts in 1849, but many residents along the southern tier of these counties wanted nothing to do with blacks and as individuals were more likely to help slave catchers from the south than the fugitive. However I have never been able to find much in the official records where authorities actively enforced these rules.