Can states really order businesses to close and limit public meetings?
The federal government is a government of enumerated powers—it has only the powers granted it by the Constitution. Therefore, for the president or Congress to act they have to locate the source of their authority within a specific provision of the Constitution.
The states, by contrast, possess a general police power—an inherent authority that is then limited by both the state and federal Constitution. A governor or state legislature can often act without a specific grant of power. The power to act is presumed, absent a specific limitation.
The federal government has the resources, but it’s the states that have the power.