One of China’s richest men squares off against President Obama in a Washington federal court today, challenging the US leader’s refusal, on national security grounds, to let him build a wind farm in the US.

“We are suing the president because we do not accept his finding that we are a national security threat. It is not true,” says Wu Jialiang, CEO of Ralls Corp., whose deal to buy land for a wind farm in Oregon near a US Navy weapons training facility ran into a presidential veto in September.