BY THE NEW YORK TIMES EDITORIAL BOARD

Next week, for the third time in eight years, Donald Trump will be nominated as the Republican Party’s candidate for president of the United States. A once great political party now serves the interests of one man, a man as demonstrably unsuited for the office of president as any to run in the long history of the Republic, a man whose values, temperament, ideas and language are directly opposed to so much of what has made this country great.

It is a chilling choice against this national moment. For more than two decades, large majorities of Americans have said they are dissatisfied with the direction of the country, and the post-Covid era of stubborn inflation, high interest rates, social division and political stagnation has left many voters even more frustrated and despondent.

The Republican Party once pursued electoral power in service to solutions for such problems, to building “the shining city on a hill,” as Ronald Reagan liked to say. Its vision of the United States — embodied in principled public servants like George H.W. Bush, John McCain and Mitt Romney — was rooted in the values of freedom, sacrifice, individual responsibility and the common good. The party’s conception of those values was reflected in its longstanding conservative policy agenda, and today many Republicans set aside their concerns about Mr. Trump because of his positions on immigration, trade and taxes. But the stakes of this election are not fundamentally about policy disagreements. The stakes are more foundational: what qualities matter most in America’s president and commander in chief.

Mr. Trump has shown a character unworthy of the responsibilities of the presidency. He has demonstrated an utter lack of respect for the Constitution, the rule of law and the American people. Instead of a cogent vision for the country’s future, Mr. Trump is animated by a thirst for political power: to use the levers of government to advance his interests, satisfy his impulses and exact retribution against those who he thinks have wronged him.

He is, quite simply, unfit to lead.

The Democrats are rightly engaged in their own debate about whether President Biden is the right person to carry the party’s nomination into the election, given widespread concerns among voters about his age-related fitness. This debate is so intense because of legitimate concerns that Mr. Trump may present a danger to the country, its strength, security and national character — and that a compelling Democratic alternative is the only thing that would prevent his return to power. It is a national tragedy that the Republicans have failed to have a similar debate about the manifest moral and temperamental unfitness of their standard-bearer, instead setting aside their longstanding values, closing ranks and choosing to overlook what those who worked most closely with the former president have described as his systematic dishonesty, corruption, cruelty and incompetence.

That task now falls to the American people. We urge voters to see the dangers of a second Trump term clearly and to reject it. The stakes and significance of the presidency demand a person who has essential qualities and values to earn our trust, and on each one, Donald Trump fails.