Trump’s approach to foreign policy is upending traditional alliances, institutions and norms.

The global order is unraveling at alarming speed, an international order that since World War Two has been underpinned by US security guarantees. Just this past week, President Trump has threatened to bomb Oman and claim the Strait of Hormuz, a recognized international waterway, as US territory. So where is the global rules-based system heading without the United States leading the way?