We had the West Coast epicenter in Washington State which came directly from Wuhan. Then, we had the New York epicenter which came from Europe via Wuhan. New York was the principle source of infection for the entire nation.
That is an assumption absent evidence, to my recollection. Most of the local hotspots across the nation did not do effective tracing, and therefore conclusions regarding source of infection are assumptive.
The original (singular) infection in the NYC area that I recall was from Iran. There were apparently others from Italy and elsewhere in Europe.
The dispersal pattern is reminiscent of bio-war games from my time in the army.