Donald Trump is moving too fast, alienating allies, making Americans poorer, and tarnishing the sterling reputation of US assets, Citadel CEO and founder Ken Griffin said Wednesday.

Though the president may have identified real problems, his methods to solve them don’t appear to be working, and are unlikely to revive American manufacturing, Griffin told Semafor’s Gina Chon at the World Economy Summit in Washington, DC.

Previously, Griffin said, “no brand compared” to US Treasurys, the strength of the US dollar, or the nation’s creditworthiness. But Trump’s tactics have “eroded” that reputation.