Question: Who obtained congressional approval of the acquisition of the Louisiana territory by the United States from France?
Sentence (from "Louisiana Purchase"): The U.S. paid fifty million francs ($11,250,000 USD) and a cancellation of debts worth eighteen million francs ($3,750,000 USD) for a total of sixty-eight million francs ($15,000,000 USD, or around $250m in 2016 dollars).
Relevant evidence: Yes