The U.S. Congress makes the laws of the U.S.
The Supreme Court of the Unites States may declare laws unconstitutional. It is the only branch legally able to do that.
because United states :Unites
It depends on what unites states you speak of.
to gain land for a railroad across the continent.
In order to make money in pacific territories and nations.
50
No
Yes
16000 slaves were in the united states
United States is commonly used as a noun, but it can function as an adjective. For example: The Unites States Navy (describing which Navy) The United States border (specificing which border)
To work
mostly protestant