It’s Now Donald Trump’s America. But George Bush’s Stamp Endures.

Arguably, that moment proved a precursor to this one as conservatives angry at his apostasy, led by a onetime backbench congressman from Georgia named Newt Gingrich, rose to power within the Republican Party and toppled the old establishment. The harder-edged Gingrich revolution in some ways foreshadowed Mr. Trump’s extraordinary takeover of the party.

Mr. Meacham said the current world of cable talk and relentless partisanship took shape during Mr. Bush’s era. “He saw it all coming, and he didn’t like it,” he said.

Mark K. Updegrove, the author of “The Last Republicans,” about the two Bush presidencies, said, “In so many ways, Bush was the antithesis of the Republican leadership we see today.” He embodied, Mr. Updegrove added, “the

  • humility,
  • civility and
  • self-sacrifice

of the best of the World War II generation. He played tough but fair, making friends on both sides of the aisle and rejecting the notion of politics as a zero-sum game.”

.. For all of the condolences and tributes pouring in to the Bush home in Houston from every corner of the world on Saturday, Mr. Trump’s very presidency stands as a rebuke to Mr. Bush. Never a proponent of “kinder and gentler” politics, Mr. Trump prefers a brawl, even with his own party. The “new world order” of free-trade, alliance-building internationalism that Mr. Bush championed has been replaced by Mr. Trump’s “America First” defiance of globalism.

.. Mr. Trump has demonstrated that he sees the go-along-to-get-along style that defined Mr. Bush’s presidency as inadequate to advance the nation in a hostile world. Gentility and dignity, hallmarks of Mr. Bush, are signs of weakness to Mr. Trump. In his view, Mr. Bush’s version of leadership left the United States exploited by allies and adversaries, whether on economics or security.

.. Mr. Bush was, in effect, president of the presidents’ club, the father of one other commander in chief and the father figure to another, Bill Clinton. Jimmy Carter always appreciated that Mr. Bush’s administration treated him better than Ronald Reagan’s or Mr. Clinton’s, while Barack Obama expressed admiration for the elder Mr. Bush when he ran for the White House.

.. Mr. Obama was among the last people to see Mr. Bush alive.

.. “What the hell was that, by the way, thousand points of light?” Mr. Trump asked scornfully at a campaign rally in Great Falls, Mont., in July. “What did that mean? Does anyone know? I know one thing: Make America great again, we understand. Putting America first, we understand. Thousand points of light, I never quite got that one.”

.. “It’s so easy to be presidential,” Mr. Trump said at a campaign rally in Wheeling, W.Va. “But instead of having 10,000 people outside trying to get into this packed arena, we’d have about 200 people standing right there. O.K.? It’s so easy to be presidential. All I have to do is ‘Thank you very much for being here, ladies and gentlemen. It’s great to see you off — you’re great Americans. Thousand points of light.’ Which nobody has really figured out.”

.. In 1988, when Mr. Bush was seeking the presidency, Mr. Trump offered himself as a running mate. Mr. Bush never took the idea seriously, deeming it “strange and unbelievable,”

.. “I don’t know much about him, but I know he’s a blowhard. And I’m not too excited about him being a leader.” Rather than being motivated by public service, Mr. Bush said, Mr. Trump seemed to be driven by “a certain ego.”