Is the Connection between the Galactic Government and the U.S. Government Seamless?

I think it would be better to say that the connection between the Galactic Government and the United Nations is seamless.

Because, after World War II the Galactic Government helped create the United Nations as a way to prevent nuclear extinction of all life on earth and of the earth itself into an Asteroid Belt.

So, you could say that the Galactic Government and the U.S. government are seamless in their connections but to be fair their relationship is with all world governments through the United Nations simply because the U.S. is only 4% to 6% of the entire world population even though it is 25% or more of the world GDP (Gross Domestic Product) 

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Gross domestic product (GDP) is the standard measure of the value added created through the production of goods and services in a country during a certain period. As such, it also measures the income earned from that production, or the total amount spent on final goods and services (less imports).

GDP and spending - Gross domestic product (GDP) - OECD ...