The Judiciary Act of 1789 which granted the court original jurisdiction over these matters was declared unconstitutional, thereby establishing the principle of judicial review. 1804-1805 Lewis and Clark expedition After the acquisition of the Louisiana Territory from France, Jefferson sent his personal secretary, Meriwether Lewis, along with William Clark to scout the new land. ... Aided by French-Canadian fur trader Toussaint Charbonneau and his native American wife Sacajawea, Lewis and Clark reached the Pacific 18 months later, and successfully returned to Jefferson with the news. ...

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• Grade Level: Undergraduate