The Supreme Court is poised to take up an issue that states have wrestled with since before the earliest days of online retail sales. It's the issue of whether states may collect sales tax from out-of-state retailers. Sam Handwerger explains why it's a bigger deal than ever.

Among the pages and pages of proposed changes in the still-evolving Republican tax plan, the Smith School's Sam Handwerger detects some signs that the party is becoming more open to a flat tax.