Wednesday night’s Republican presidential debate, held in Tuscaloosa, Ala., will feature just four candidates — Nikki Haley, Ron DeSantis, Vivek Ramaswamy and Chris Christie — sparring over everything from abortion to Israel to former President Donald Trump. When we asked Times Opinion columnists and contributors what they would ask the candidates if they were moderating the debate, they came back to us with questions designed to test them on guns and crime, foreign wars and health care — exposing where the field stands on, say, military aid for Ukraine or a draconian state abortion ban. But above all, what they wanted to see was the moderators needling the candidates into taking a strong stance on the former president. Here were the responses:

Gov. Haley, you have your first ad up about “moral clarity” and “chaos.” But you don’t mention Donald Trump. Why not?

Should Donald Trump be prohibited from running for president because of Jan. 6 and all these federal charges?

If you’re elected president, would you consider pardoning Donald Trump if he’s convicted by a jury of one or more of the 91 felony counts he faces?

The Republican Party has lost the majority of the popular vote in seven out of the last eight presidential elections. Despite this, it has held the presidency for a total of 12 years because of the Electoral College. If you are the nominee in 2024 and you win the majority of the popular vote but lose the Electoral College, would you concede to Joe Biden?

Gov. Haley, please name one United States military intervention in the last 30 years that you believe was a mistake, and explain why.

Gov. DeSantis, while running for president in 2016, Donald Trump promised to replace Obamacare with some form of universal health care. Do you support repealing Obamacare with a measure that guarantees health insurance to all Americans? If not, why? If so, what would that measure be?

Gov. Haley and Gov. DeSantis, if Donald Trump is the Republican nominee, is there anything he could do between now and November 2024 that would make you refuse to support him against Joe Biden? If so, please specify.

For all the candidates: The Western world is aging rapidly. The Republican Party currently stands for serious restrictions on immigration. Is there any public policy that your hypothetical administration would pursue that would encourage Americans to have more kids?

Guns are the leading cause of death for children in America today. And the states with the highest firearms mortality rates are mostly Republican states. Why is that, and what specific steps can we take to reduce gun deaths in America?

President Reagan was known for standing up relentlessly to Moscow. Yet if Republicans continue to block President Biden’s requests for aid to Ukraine, isn’t Russia the big winner? Has the G.O.P. come full circle from confronting Russian aggression to becoming its best hope?

Gov. Haley, immigration policy continues to be sacrificed on the altar of political gamesmanship. Border security is important, but it is only one piece of the puzzle. As president, how would you jump-start a push for bipartisan, comprehensive reform?

Mr. Ramaswamy, what would it take for you to drop out of this race and spare Americans your troll-y nonsense? A column in The Daily Caller? Your own Fox News show? The promise of a midlevel cabinet post?

Gov. DeSantis, why has your candidacy been sagging? What do you plan to do to turn it around?

Gov. Christie, the base seems to hate you. How do you respond to people who worry that you staying in the race any longer is helping Donald Trump by preventing non-Trump voters from consolidating behind a challenger whose campaign is getting more traction?

A question for all: Confidence in the military, while still relatively high compared with confidence in other institutions, is the lowest it’s been in over 25 years, at the same time that the military is struggling to bring in recruits. What would you do to restore trust in the military and recruit more people to volunteer for the armed services?

Gov. DeSantis, if you were in Congress today, would you vote with Senate Minority Leader Mitch McConnell to continue military and economic aid for Ukraine and sustain Kyiv in its war with Russia for the next year, or with the House isolationists against any further aid? If it is the latter, how would you react if Vladimir Putin publicly thanked you?

Gov. Haley, the late Henry Kissinger became famous for his diplomacy, with President Nixon, for peeling China away from the Soviet Union back in the 1970s. If you were president today, would you consider attempting such a move with Xi Jinping’s China, or do you think we should confront Russia and China at the same time? How would that make America more secure?

Gov. Haley, as possibly America’s first Indian American president, do you think we should get tougher with President Narendra Modi to limit his curtailments of Indian democracy, or are you OK with what he’s doing?

Gov. DeSantis and Gov. Haley, in 2021, your states — Florida and South Carolina — had higher homicide rates per capita than New York and California. That was also true in 2020, and 2019, and 2018, and 2017, and 2016 and 2015. Why is that?

Twenty women are suing Texas after being denied abortions, including in cases of severely dangerous or nonviable pregnancies. Should Texas amend its abortion ban to create a health exemption?

Gov. DeSantis, you made your crusade against what you called “wokeness” a centerpiece of your governorship and a springboard for your presidential bid. You even wrote a book in which anti-wokeness was a central theme. But over the summer, polling showed that Republican voters were unlikely to be swayed by a narrow focus on rooting out left-wing ideology in schools, media, culture and business — and you didn’t mention the word “woke” in any of the first three debates. Did you overestimate the currency anti-wokeness would have with the Republican primary electorate, and do you regret such a laserlike focus on a single cultural topic?

Our constitutional right of “free speech” has become a partisan issue. This is having a chilling effect on research, education and public workers. How do you define “free speech”? What role should the president and Congress play in shaping the way that free speech intersects with public institutions?

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