President Emmanuel Macron of France is a complicated U.S. ally.

Macron often undermines U.S. security concerns in relation to China. Yes, a French warship joined South China Sea exercises with the United States and the Philippines last week. But Macron will now fete Xi with a state visit beginning on Sunday. For just one example of why this matters, consider China’s increased access to the French technology sector (which Macron says is on the table). Macron claims any technology sharing would be focused on civilian concerns. The problem is that China exploits any and all Western technology and research it accesses in order to strengthen the People’s Liberation Army. That puts American lives at greater risk in the event of any future, and likely, U.S.-China war.