Answer :
- The primary source of US constitution was written in Pennsylvania, Philadelphia in 1787
- It was written by honorable President George Washington and the federalist powers
- It was published in 1788.
Explanation:
Yes, the preamble of the US constitution is a primary source. All documents of state, such as the US Constitution, and any federal, state, and local government-issued documents are immediate accounts of information categorized as primary sources.