If the Federal Reserve, a bedrock of global financial stability, were to withhold dollar funding to allies during times of stress, the world could greatly reduce its reliance on the currency, creating “a doubled-edged sword” for the U.S., Deutsche Bank analysts said.

Reuters reported on Saturday that some European central banking and supervisory officials are questioning whether they can still rely on the U.S. central bank to provide such funding as their trust in Washington has been shaken by the Trump administration’s policies.