Readers discuss lawsuits against The Des Moines Register and ABC News. Also: Violence in school; a Mideast bridge; cash and the disabled; murder is wrong.

President-elect Donald J. Trump threatened to impose tariffs on countries that seek to replace the dollar in trade or undermine its global reserve currency status.

Moderation on pot and other vices appears to have been part of a calculated effort to turn out young men for the G.O.P. — but it may come with consequences.

The President-elect is demanding the so-called BRICS countries pledge fealty to the greenback, or risk a new wave of tariffs.

While China could offset American tariffs by letting its currency fall, that might endanger Beijing’s recent efforts to stabilize the economy.