Initially at first what did the colonist need the native Americans

Native Americans, also known as American Indians, Indigenous Americans and other terms, are the indigenous peoples of the United States, except Hawaii and territories of the United States.

There are 574 federally recognized tribes living within the US, about half of which are associated with Indian reservations. The term "American Indian" excludes Native Hawaiians and some Alaskan Natives, while "Native Americans" are American Indians, plus Alaska Natives of all ethnicities.

The US Census does not include Native Hawaiians, Samoans, or Chamorros, instead being included in the Census grouping of "Native Hawaiian and other Pacific Islander".

Explanation:

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impeachment is when a president is committing treason or doing shading acts while in presidendcy therfor he can be impeached   by congress