The U.S.’s closest allies and its largest economic rival have found an unexpected adversary on trade: the U.S.

As China prepares to retaliate over a fresh round of U.S. tariffs, America is becoming isolated from its closest allies, who have rolled out their own responses to U.S. steel and aluminum tariffs.

Tensions not only over trade but also immigration, terrorism, the environment and other issues simmered through two days of the Group of Seven meetings last weekend, according to people who were present.

European diplomats said their leaders were dismayed that they couldn’t move U.S. President Donald Trump on basic issues, such as the economics of U.S. trade deficits.

“The mood really changed after the G-7,” a European Union official said.