Answer:
The current constitution of the United States is the United States Constitution. It was promulgated on September 17, 1787, when it was adopted by the Constitutional Convention in Philadelphia, Pennsylvania. It went into effect on March 4, 1789, when the first Congress under the new Constitution convened. The United States Constitution is one of the oldest written national constitutions still in use and has served as a foundational document for the U.S. government for over two centuries.
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