What cranch of the federal government is the US Cogress?

The U.S. Government is called a Federal Government because it is at the Federal (or highest) Level, there is no other government above it.

Our forefathers argued about this for years before penning the Constitution. The main objectives for the US Federal Government, that is all three branches: Executive, Judicial, and Legislative...

there is no division of power in the government

Government is needed because it is the institution through which the people are able to maintain order, provide public services, and enforce decisions that are binding on all members of society....

because the US has power (federal) and the government ,which is the citizens, elect leaders to represent them.