The answer is The Allied governments feared that Germany was developing Atomic weapons
The Articles of Confederation experienced challenges during the transition. This marked the creation of a national government of the US. Despite the sovereignty already given by the British to the US, still, it practices its economic and political activities on US territory. Some of the concerns are the transfer of their convicted criminals and trade which should have stopped. Internal conflicts also raised from the citizens are political power and revolutionary debt. All of this led to a solution of creating a constitution.
The Chinese exclusion act , hope this helps
