With the nearly century-old Jones Act put back in force, battered Puerto Rico’s future just got even darker. The Department of Homeland Security’s decision to end the commonwealth’s waiver from the law means that its seaborne commerce with the mainland must again be carried on ships owned, built and crewed by Americans. The island’s people — also Americans, if the …

Thankfully, President Donald Trump’s threats to summarily “terminate” the free-trade deal between the US and South Korea have so far proved empty. Now, as the two sides sit down to renegotiate, there’s a chance to make some real improvements. By most measures, the agreement, known as Korus, has been broadly beneficial since it came into effect in 2012. Trade between …

Corporate tax cuts are becoming a hot-button issue. Economist Larry Summers, a frequent policy adviser to Democrats, has denounced President Donald Trump’s corporate tax plan as a giveaway to the rich. Meanwhile, Kevin Hassett, the chairman of Trump’s Council of Economic Advisers, has claimed that the plan would increase average wages by anywhere from $4,000 to $20,000 a year. The …