"Democratic institutions take much time, effort, and patience to build but can be torn down all too quickly," Powell said. WASHINGTON, May 31 (Reuters) - U.S. Federal Reserve Governor Jerome Powell on Sunday warned about the impact of a politicized Fed and made a broader call for the defense of democratic institutions in his first public remarks since the end of his eight-year stint as head of the central bank. “Democratic institutions take much time, effort, and patience to build but can be