“This trial in so many ways crystallized the completely diametrically opposed threats that Democrats and Republicans see to the country,” Murphy told The Times’s Nicholas Fandos. “We perceive Donald Trump and his corruption to be an existential threat to the country. They perceive the deep state and the liberal media to be an existential threat to the country.

“That dichotomy, that contrast, has been growing over the last three years, but this trial really crystallized that difference. We were just speaking different languages, fundamentally different languages when it came to what this trial was about. They thought it was about the deep state and the media conspiracy. We thought it was about the president’s crimes.”

I feel like I have spent my career watching the same depressing dynamic that unspooled Friday night: Democrats trying, sometimes ineptly, to play fair and Republicans ruthlessly trying to win.

I watched it with the Anita Hill-Clarence Thomas hearings. I watched it in the 2000 recount with Bush versus Gore. I watched it with the push by W., Dick Cheney and Donald Rumsfeld to go to war in Iraq. I watched it with the pantomime of Merrick Garland.

Democrats are warning Republicans that they will be judged harshly by history. But in the meantime, the triumphant Republicans get to make history. And a lot of the history that Republicans have made is frightening: the endless, futile wars, the obliviousness to climate change, the stamp on the judiciary.

As Carl Hulse writes in his book, “Confirmation Bias,” about the Garland fiasco: “The success in naming judges was the signal achievement of Trump’s first two years. In the coming years, those judges will be among the members of the federal bench called to rule on Trump’s policies and practices in cases arising from challenges initiated by increasingly confrontational Democrats and other legal adversaries around the nation. Mitch McConnell made a snap decision one night in 2016. The consequences will reverberate for decades.”

For hours on Friday, the House managers made their vain final arguments. Pressing for Bolton’s testimony, Val Demings implored Republican senators: Aren’t you worried that, if left in office, Trump will harm America’s national security, seek to corrupt the upcoming election and undermine our democracy to further his own personal gain? Don’t you want to hear the witnesses and see the documents that would give the full story and make this a fair trial rather than a mock one?