When Philippine leader Rodrigo Duterte visits China this week, he'll need to salvage something from a "pivot" to Beijing that has left him empty-handed and exposed his neighbors to a new level of brinkmanship in the South China Sea.
Despite his huge domestic popularity and great affection for China, Duterte is under growing pressure to push back at its growing maritime assertiveness. After avoiding the issue for three years, he has vowed to raise with Chinese President Xi Jinping a 2016 arbitration ruling that invalidated China's claim to sovereignty over most of the South China Sea.
The trip comes amid a recent rise in tension on multiple fronts, with Chinese vessels challenging the energy assets and sea boundaries of Malaysia, Vietnam and the Philippines, prompting warnings and rebukes by the United States, which accuses China of "coercive interference" and holding hostage $2.5 trillion of oil and gas.