Economy

The issue of trade has been an important dividing line within both parties this year. Democratic and Republican candidates are backing away from supporting free trade amid voter concerns and a rising tide of populism.

Airlines are expecting record numbers of spring break travelers. Both the industry and TSA are expecting airport screening checkpoints to have long lines. They urge travelers to arrive early.

Mayor Bill de Blasio wants to rezone some neighborhoods to allow more construction. The plan is encountering opposition from some of the people hit hardest by the housing shortage.

The transformation of Pittsburgh echoes the triumphs and challenges of cities across the country where gentrification is changing neighborhoods after a generation of economic decline.