U.S. President Donald Trump hosts South Korean President Lee Jae Myung in Washington for their first summit meeting on Monday, after the countries struck a trade deal last month lowering U.S. tariffs on the Asian ally to 15% from a threatened 25%.

With US foreign policy in flux, Japan and South Korea are finding common ground on trade, defense, and demographic challenges.

Barely two months into office, South Korean President Lee Jae Myung faces a pivotal foreign policy test, heading into back-to-back summits in Tokyo and Washington that reflect the wider struggle of U.