Liberal billionaire George Soros said Thursday that the U.S. economy could be headed for calamity as a result of President Donald Trump’s efforts to juice American business and stock prices ahead of the 2020 election.

“Trump’s economic team has managed to overheat an already buoyant economy,” Soros warned his guests at an informal dinner at the World Economic Forum in Davos, Switzerland.

“The stock market, already celebrating Trump’s military success, is breaking out to reach new heights,” he said. “But an overheated economy can’t be kept boiling for too long. If all this had happened closer to the elections, it would have assured his reelection.”

“His problem is that the elections are still 10 months away, and in a revolutionary situation, that is a lifetime,” Soros said.