(Bloomberg) -- Former Wynn Resorts Ltd. Chief Executive officer Stephen Wynn may face trial in a lawsuit brought by the government to compel him to register as a Chinese lobbyist. 

The parties are unlikely to reach a settlement, according to a Tuesday filing in US District Court in Washington. 

The government sued Wynn in May to compel him to register as a Chinese agent. Wynn has argued he wasn’t lobbying when he told the Trump administration that China wanted the US to extradite Guo Wengui, an exile who criticized the Chinese government. The government’s civil case marks the first Foreign Agents Registration Act lawsuit by the Justice Department in more than 30 years. 

In its lawsuit, the government claimed that Wynn was acting to protect his casinos in Macau when he told former President Donald Trump about China’s position on Guo, as well as White House and National Security Council officials. 

Wynn’s lawyers argued that he passed along the message from Sun Lijun, then-Vice Minister of China’s Ministry of Public Security, as a diplomatic offer and that he was “fully transparent in his dealings with the Trump Administration.” The Trump Administration rejected the offer. 

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