From Bloomberg: Trump’s Fear of Experts Hurt the Coronavirus Response
In emergencies, it’s supposed to be the experts — not the president — who are in charge. As a constitutional matter, emergency powers come from Congress and are granted to the executive. They are not inherent executive powers of a kind that a president may have in wartime by virtue of being Commander in Chief. (Although Congress could, in theory, grant special emergency authority to the president himself, subject to it being exercised by rational, bureaucratic experts who work for him.)
Similarly, emergency laws vest executive decision-making authority in expert-run agencies, not the White House. Thus, a typical emergencies powers law says that when the president invokes an emergency — whether in a public health crisis or a natural disaster — the relevant agency is authorized to perform the emergency functions. Those agency decisions have to be based on rational decision making and have to be explained publicly, even if after the fact. These laws are supposed to avoid a situation where a president relies on his own instincts or advice from non-experts in his circle.