Readers criticize President Trump over his bellicose statements on Iran. Also: Education for every child, citizen or not; the cost of war.

President Trump has vacillated between boasting about U.S. military superiority and deep frustration that his war of choice is not always having the desired effects.

© Tierney L. Cross/The New York Times

As the conflict with Iran expands and intensifies, President Trump’s options — to fight on, or to move toward declaring victory and pulling back — both carry deeply problematic consequences.