Southwest Airlines has canceled more than 2,000 flights since Friday, amounting to about a third of its schedule over the long weekend. The disruptions left tens of thousands of passengers stranded, and the carrier’s operations are still playing catch-up. On top of the usual consumer agony and social media meltdowns that this has inspired, there’s a bizarre twist: Southwest’s predicament has become a talking point for conservative commentators and politicians in their campaign against vaccine mandates.