Steve Wynn, CEO of casino operator Wynn Resorts, has been accused of attempting to secure the deportation of a Chinese billionaire who’s been tweeting dirt on Beijing corruption.

On Monday, the Wall Street Journal reported that Steve Wynn (pictured left) had delivered a letter from Beijing to US President Donald Trump seeking the deportation of Guo Wengui (pictured right), a Chinese billionaire/dissident currently living in Manhattan in self-imposed exile.

Since fleeing China in 2014, Guo has been using his Twitter account to accuse multiple high-ranking Chinese officials and prominent businessmen of government-related corruption. Guo, who has applied for political asylum in the US, intensified his corruption allegations just as China commenced its 19th Communist party congress, at which President Xi Jinping is to be confirmed for a second five-year term.

According to the WSJ report, Wynn – who was appointed finance chairman for the Republican National Committee in January – hand-delivered the letter from Beijing seeking Guo’s deportation at a private dinner with Trump this summer.