South Korea’s slide into constitutional chaos echoes dysfunction in the U.S.—and promises headaches for Washington.

As they hold vigil, Yoon’s supporters wave American flags alongside the South Korean Taegeukgi, its national flag. Red “Make America Great Again”-inspired hats are selling for about $5.50 at ...

Many wave American flags, while others carry banners with conservative U.S. political slogans, such as “Make Korea Great Again,” linking Yoon’s situation to the future of U.S.-South Korea ...

While Yoon was barricaded inside his home, his supporters waved U.S. flags and adopted Trump’s “Stop the Steal” slogan to ...

Yoon, widely seen as a conservative firebrand and staunch US ally tough on China and North Korea, has urged his supporters to do the same. As they hold vigil, Yoon’s supporters wave American flags ...