The nation that has the most political divisions within it is the United States.
Explanation:
The United States is a sovereign country constituted in a federal constitutional republic composed of fifty states and one federal district. Most of the country is located in the middle of North America - where its forty-eight contiguous states and Washington DC, the federal district, are located -, between the Pacific and Atlantic oceans, borders Canada to the north and Mexico to the south. The state of Alaska is in the northwest of the continent, it borders Canada to the east, separated from Russia to the west by the Bering Strait. The state of Hawaii is a Polynesian archipelago in the middle of the Pacific Ocean, and is the only one of its states that is not found in America. The country has several unincorporated territories in the Caribbean Sea and in the Pacific.
Mexico is a country located in the southern part of North America with capital in Mexico City, politically it is a representative, democratic, federal and secular republic, composed of 32 federal entities.
Canada is a sovereign country in North America, whose form of government is the federal parliamentary monarchy. Its territory is organized in ten provinces and three territories.
The Dominican Republic is a Caribbean country with a unitary organization, so it does not have political divisions in its territory.
