The headline on this story -- "Retailers Split Over Sunday Alcohol Sales" is a little misleading, and the first paragraph is more so:
Opposition to a push for Indiana to repeal its long-standing ban on Sunday alcohol sales may come from an unexpected source, a newspaper reported: liquor stores.
The opposition in question is from package-store owners, and what's unexpected about that? They already have competition throughout the week, and they get Sundays off. They don't want to have to open on Sundays to compete for market share. This doesn't add much to the debate over Sunday sales.