From the perceptive Megan McArdle at The Atlantic:
I find it hard to believe that none of the liberal commentators breathlessly celebrating Wal-Mart's "capitulation" on national health care have even entertained the most parsimonious explanation: that Wal-Mart is in favor of this because it raises the barriers to entry in the retail market, and hammers Wal-Mart's competition. Yet somehow, this appears nowhere in any of the analysis.
She wraps up: "All of which is to say, Bootleggers and Baptists should be required reading in all schools. When you find strange bedfellows in politics, don't look for a surprising outbreak of spontaneous virtue: looking [sic] for the hidden conspiracy."