Opinion | The Responsibility of Republican Voters

Iowa Republicans who will gather on Monday to cast the first votes of the 2024 presidential campaign season, and voters in New Hampshire and the states that will follow, have one essential responsibility: to nominate a candidate who is fit to serve as president, one who will “preserve, protect and defend the Constitution of the United States.”

Donald Trump, who has proved himself unwilling to do so, is manifestly unworthy. He is facing criminal trials for his conduct as a candidate in 2016, as president and as a former president. In this, his third presidential bid, he has intensified his multiyear campaign to undermine the rule of law and the democratic process. He has said that if elected, he will behave like a dictator on “Day 1” and that he will direct the Justice Department to investigate his political rivals and his critics in the media, declaring that the greatest dangers to the nation come “not from abroad, but from within.”

Mr. Trump has a clear path to the nomination; no polling to date suggests he is anything but the front-runner. Yet Republicans in these states still have their ballots to cast. At this critical moment, it is imperative to remind voters that they still have the opportunity to nominate a different standard-bearer for the Republican Party, and all Americans should hope that they do so. This is not a partisan concern. It is good for the country when both major parties have qualified presidential candidates to put forward their competing views on the role of government in American society. Voters deserve such a choice in 2024.

Mr. Trump’s construction of a cult of personality in which loyalty is the only real requirement has badly damaged the Republican Party and the health of American democracy. During the fight over the leadership of the House of Representatives in the fall, for example, Mr. Trump torpedoed the candidacy of Tom Emmer, a lawmaker who voted to certify the 2020 election results, to ensure the ascendancy of Mike Johnson, a loyalist who was an architect of the attempt to overturn that election. (Mr. Emmer has since endorsed Mr. Trump.) But some Republicans have set an example of integrity, demonstrating the courage to put their convictions and conservative principles above loyalty to Mr. Trump. Examples include people whom he once counted as allies, like former Attorney General Bill Barr, former Gov. Doug Ducey of Arizona, former Secretary of State Mike Pompeo and the evangelical leader Bob Vander Plaats.

Voters may agree with the former president’s plans for further tax cuts, restrictions on abortions or strict limits on immigration. That’s politics, and the divisions among Americans over these issues will persist regardless of the outcome of this election. But electing Mr. Trump to four more years in the White House is a unique danger. Because what remains, what still binds Americans together as a nation, is the commitment to a process, a constitutional system for making decisions and moving forward even when Americans do not agree about the destination. That system guarantees the freedoms Americans enjoy, the foundation of the nation’s prosperity and of its security.

Mr. Trump’s record of contempt for the Constitution — and his willingness to corrupt people, systems and processes to his advantage — puts all of it at risk.