Why were the areas with the federalist majority found mostly along the atlantic seacoast?

The areas with the federalist majority were mostly found along the Atlantic seacoast as these areas had much more trade and merchants.

Moreover, most of the first cities to be settled, were on the Atlantic coast and because of this, the biggest part of the population lived in those cities when the federalist party first formed.

the correct answer is: the fact that the anti-federalist papers were considered poorly written.