President Trump must avoid at all costs a direct military confrontation with North Korea, which has a long history of engaging in brinksmanship. The United States has been successful in defusing past crises by working in partnership with U.S. allies in the region. Today, China calls for restraint, and South Korea is urging a diplomatic solution. [...] President Trump could demonstrate his art of deal making by advancing the only solution that’s ever worked: diplomacy and engagement.