President Joe Biden is gathering leaders from countries across the Americas on Friday in the U.S. capital to discuss the tightening of supply chains and addressing migration issues. In a preview of the first Americas Partnership for Economic Prosperity Leaders’ Summit, White House National Security Council spokesman John Kirby told reporters Thursday that the two-day event would be a “once in a generation opportunity” to shift more of the global supply chains to the Western Hemisphere. Kirby said the summit would also involve the “shared migration challenge”...