Wal-Mart (NYSE:WMT) kicked off July with an earnings miss on weak comp store sales. If you're a Wal-Mart shareholder, you may have Uncle Sam to thank for the weak numbers that were in part driven by the end of the payroll tax holiday and the delay in the IRS delivering refunds. The discounter has already been scrambling to address the potential cost of the Affordable Care Act, affectionately known as Obamacare.

In the video below, Fool.com contributor Doug Ehrman discusses the specifics of how he feels government policies were a big culprit in Wal-Mart's miss.

Fool contributor Doug Ehrman has no position in any stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.