It’s not just that President Trump serially lies in plain sight. (What’s The Washington Post’s latest tally? 13,435? Whatever: Just imagine a whirring odometer on a shuttle to Mars.) It’s that he’s surrounded by occluders and toadies, nihilist tricksters spun directly from the looms of the Marx Brothers’ imagination. (“Who you gonna believe? Me or your own eyes?”)

A raft of congressional Republicans — including (say it with me) Senator Lindsey Graham — learned that our top diplomat in Ukraine had confirmed the Trump administration’s aid-for-dirt caper, yet still insists the impeachment proceedings are a sham. The acting White House chief of staff, Mick Mulvaney, acknowledged this same quid pro quo in a news conference, only to proclaim later that none of us understands English. Any public servant who dares say that two plus two just might equal four is immediately accused by Trump of radicalism, treason, witch hunting.

Compare that with President Barack Obama’s relationship with those who inconvenienced him. When James Comey, then the head of the F.B.I., made the fateful decision to announce that he’d reopened his inquiry into Hillary Clinton’s emails just days before the 2016 election, Obama could not have been especially pleased. By imperiling Clinton’s chances, Comey was imperiling Obama’s own legacy too. Yet Obama still behaved warmly toward him, according to James Stewart in his new book, “Deep State.” Why? Because “Democrats,” as Jonathan Chait explained in his review of that book, “still believed in institutions and norms.”

This idea — that Democrats still believe in norms, customs, the rather crucial notion of checks and balances, in government itself — may be the crux of the multiverse problem. Look at someone like Joe Biden, whose essential pitch (in addition to experience, incremental change, working-class-guyness) is that he can work with the men and women on the other side of the aisle.

But this suggests that compromise is an option. It doesn’t appear that the other side is much interested. You have Mitch McConnell, the Senate majority leader, holding a Supreme Court appointment hostage for nearly a year, blocking almost all legislative debate and passing a bill to protect the 2020 elections from foreign interference only under extreme duress; the world’s “greatest deliberative body” is now a speedway for the Trump agenda. When they were in charge, you had House Republicans informally observing the Hastert rule— named for the former speaker Dennis Hastert, who was carted off to prison for paying hush money to a former student he’d sexually abused — which says bills can come to the floor only if a majority of the Republicans support them. It virtually ensures minoritarian rule.