History and current polling both tell us that the House of Representatives will likely flip over to Republican control in the November midterms. What happens then? Actual governance will come to a standstill. There will be a flurry of investigations on everything from the Justice Department to Hunter Biden to the border crisis. The Jan. 6 committee will almost certainly be disbanded. And it’s not implausible to imagine that President Biden will be impeached.

How did we get here? There are, of course, many reasons. But the central facilitating factor is surely the way that U.S. politics has, over the past few decades, increasingly empowered the extremes of political parties at the expense of the mainstream.