President Trump railed against Xi Jinping in a late-night social media post days ahead of their planned call, complaining that the Chinese leader is “extremely hard to make a deal with” as trade talks stall.

President Donald Trump said in a late-night social media post that Chinese leader Xi Jinping was very tough to make a deal with, raising questions about whether a fragile economic truce between the world’s two largest economies will hold.

Even the president appears to be doubting his strategy to win over Beijing, as relations fray between the trading partners.