Readers discuss ways to counter President Trump. Also: An unyielding Harvard; a Supreme Court ruling on transgender troops; the Zen of A.I.

Americans skimp while their president splurges.

The lessons from World War II are critical for understanding how to restore and maintain long-term peace and security in Europe today.

Senator Chris Murphy argues voters want to know who’s screwing them.

There are no shortcuts in war.

A blueprint for revitalizing the opposition.

And how exactly can we tell whether America has crossed the line?

Senator Chris Murphy on the Democrats’ “five alarm” crisis.

The academy has changed.

A call for showing courage against tyrants.

The charitable tax deduction is distorting American philanthropy.

The French radical believes that France has something to teach the world.

The plan to eliminate the endowments for the arts and the humanities. Also: A threat to impose tariffs on movies made abroad.

At times, the skirmishes between India and Pakistan can seem more like reality TV spectacle, but these strikes are worryingly different.

These Republican women use the vernacular of influencers to spread their message. It’s working, for now.

Republican women know what they’re doing.

A discussion about Pope Francis’ pontificate and who will be elected the next pope.

Republican leaders face a problem: They have staked it all on passing the tax bill, but that bill makes it more difficult to criticize President Trump’s tariffs.

We may be at the brink of reclaiming our health.

Trump’s assault on higher education could get worse — far worse.

After the fall of the Assad regime, not all Syrian refugees can return to the country. One comes as close as she can.

Trump is raising a lot of money and a number of constitutional questions.

Should we pity the wealthy?

The National Climate Assessment has a setback, but help is on the way. Also: Vietnam-era exiles from the U.S.; drugs and tariffs.

Representative Marie Gluesenkamp Perez discusses Trump’s tariffs and where Democrats have gone wrong.

Representative Marie Gluesenkamp Perez discusses Trump’s tariffs and where Democrats have gone wrong.

The economic forecasts are murky, the markets are gyrating, and maybe we’ll all get fewer dolls this year.

We don’t need to revive the old shop class, but we do need to bolster funding for career and technical education.

“For the first time since having my kids, I felt like a whole person.”