So why is Rebecca Gilman’s new drama called Swing State? Granted, it takes place in rural Wisconsin, in the recent past, when COVID shots were novelties and the Delta variant was lurking. But there’s not a lot political going on among her four principals, beyond a general head-butting between Peg (Mary Beth Fisher), the liberal, nature-loving recent widow occupying Todd Rosenthal’s hyperrealistic prairie home set, and the more traditionalist, presumably Trump-loving denizens around her. (Gratefully, the man himself rates only one mention.) In fact, when you get down to it, there’s really not a lot of anything going on.