If the Trump administration allows Nicolás Maduro to endure, it would signal that a criminal dictatorship masquerading as a state can stare down the United States and win.

Belief is reasonable. Skepticism is inevitable.

Provided Europeans want to fight for it.

Readers discuss the Trump administration’s National Security Strategy. Also: Hollywood and culture; fighting in a family.

I doubt this was what Trump meant when he called himself “Mr. Brexit.”

There’s a big difference between being useful and being respected.

“One Rulebook” is not the kind of A.I. regulation this country needs.

Either merger would be bad for the country.

Through their reporting, the columnists share how regular citizens stand up to governments they oppose.

Threats against us aren’t limited to one hemisphere.

Innovations in A.I., synthetic biology and quantum computing are set to change war.

A case over a firing at the F.T.C. has far-reaching implications for the federal government.

The nature of war has drastically changed. The editorial board argues that the U.S. must reform its military.

The system in the House promotes control by party leaders over accountability and achievement.

“I’m not going to make any predictions, but I will say it feels as if right now is the most popular he’s going to be over the next year,” the columnist Jamelle Bouie predicts of Trump.

On “The Opinions,” the columnist Jamelle Bouie argues that the president is randomly blowing up boats in the Caribbean — what Bouie calls “criminal murder.”

Readers respond to Michelle Cottle’s essay about her experience with her parents and the growing caregiver crisis.

Trump’s travails look more and more like Biden’s.

The latest and best evidence of the damage is a warning about Trump-era tariff policies.

Investing in the old ways of war leaves America at risk.

Will the court grant a vast transfer of power from Congress to the president?

Do you know where your retirement savings are invested? When I looked into mine, I discovered that parts of it ran counter to U.S. foreign policy priorities.

Many states have proposed bans on the sale of ultraprocessed foods in schools. The problem is the way they define ultraprocessing.

Readers respond to a column by David Brooks about his unconditional love for America.

A former secretary of homeland security on the illegality of Trump’s boat strikes.

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The Warner Bros. deal has the town on edge.

What a special House election just told us.

Pay attention to how you pay attention.