The provided sources overwhelmingly and consistently support the statement. Multiple high-authority news organizations, including CNBC, Reuters, The New York Times, and The Hill, directly report on Donald Trump making public statements that question the legitimacy of Joe Biden's Federal Reserve appointments. Specifically, the CNBC and Reuters articles point to Trump's claim that he 'heard' the appointments were signed by 'autopen,' a clear challenge to their validity. The Hill's report is exceptionally direct, stating that Trump 'questioned the legitimacy of former President Biden's appointments to the Federal Reserve Board of Governors.' The New York Times corroborates this by reporting on Trump's public 'attacks' on the Fed governors appointed by Biden. There is no contradictory information within the supplied sources; the lower-relevance sources are on unrelated topics and do not refute the claim. The evidence is direct, consistent across multiple credible outlets, and leaves no room for doubt based on the materials provided.