Israel’s decades-long peace with Jordan is unraveling, a development that threatens to upset a fragile regional stability that is being challenged by countries like Iran, Russia, and China, a think tank report warns.

“All of this should come as unwelcome news to the United States and to America’s Middle East allies. In anticipation of intensifying great power competition with China, and perhaps to a lesser extent Russia, it is crucial for Washington to project unity among allies in the Middle East,” the report says. “This is especially the case amidst the continued havoc that the Islamic Republic of Iran is exporting across the region.”