Washington (AP) — Reversing his past calls for a speedy exit, President Donald Trump renewed the United States' commitment Monday to the 16-year-old war in Afghanistan, declaring that U.S. troops must "fight to win." He pointedly declined to disclose how many more troops might be sent to wage America's longest war.

In a prime-time address to unveil his new Afghanistan strategy, Trump said the U.S. would shift away from a "time-based" approach, instead linking its assistance to results and to cooperation from the beleaguered Afghan government, Pakistan and others. He insisted it would be a "reg...