Another item on Joe Biden’s to-do list for his first one hundred days in office is the establishment of 100 federal vaccination sites, or “pods,” around the country. That plan understandably had governors and mayors of large cities pretty excited, given how hard it’s been to make significant progress toward herd immunity. It’s a plan that drew bipartisan interest, too. The state Department of Health in Oklahoma, not exactly a blue state by any measure, was ready to sign up for federal pods in three of their largest cities. But as details of the plan emerged, they quickly backed off....