The invoking of national security to unravel trade agreements could scramble the international trading system in China’s favor.

Ties between the United States and Mexico have deepened over 30 years of free trade, creating both benefits and irritants.

President-elect Donald J. Trump has leaned heavily on familiar faces from the cable network as he fills out his second-term cast.

Economists have long helped to shape policy on issues like taxes and health care. But flawed forecasts and arcane language have cost them credibility.

President-elect Donald J. Trump has moved beyond the team-of-rivals approach from his first term and chosen economic aides who will defend tariffs and tax cuts.

The folk trio he formed with Noel Paul Stookey and Mary Travers became a pop phenomenon, scoring hits like “If I Had a Hammer” and “Puff the Magic Dragon.”

With Peter, Paul and Mary, the musician, who died on Tuesday at 86, eased folk songs into the Top 10.