Hyperpartisanship is as old as American democracy. But now, acrimony is not confined to a moment; it’s a permanent state of affairs and has seeped into every part of the political process. So say political scientists Thomas Mann and Norman Ornstein. When their book “It’s Even Worse Than It Looks: How the American Constitutional System Collided With the New Politics of Extremism” was published a few years ago, it stirred up considerable controversy and altered the debate about why America’s government has become so dysfunctional. Now, at the end of the Summer of Trump, we’ll check back in with Norman Ornstein and Thomas Mann. We’ll talk about political extremism and polarization, another possible government shutdown, Utah’s caucus and convention system, the U.S. Supreme Court’s recent ruling on Arizona’s redistricting commission, Australia’s carrot and stick approach to increasing voter turnout, and much more.