This follow-up post is only for tax nerds; it gets pretty deep in the weeds, or wheat fields. I was interested in this comment in a WSJ piece on Governor Brownback, who’s struggled to enact supply-side reforms in Kansas:
During a brief presidential run in 2007, Mr. Brownback said he saw economic growth in parts of South Dakota—where there is no income tax—outpacing activity just across the border in Iowa, which has such a tax.