Comment by stonogo

In this instance, this work is explicitly assigned to Congress directly in the Constitution. It does not arbitrarily limit the methods with which Congress carries out this work. There is no reason Congress cannot hire people to carry out this work and empower those employees to do so, which is something Congress commonly does in dozens of other instances, and has from the beginning.

There is also no requirement that the executive branch involve itself in that process. This is just another expansion of executive power; the latest in a decades-old tradition of Congress abdicating its responsibilities.