Answer:
The Louisiana Purchase was controversial because MANY PEOPLE THOUGHT THAT PRESIDENT JEFFERSON DIDN'T HAVE THE CONSTITUTIONAL POWER TO DO SO.
However, it was the foundation for the westward expansion of the United States. The purchase doubled the size of the country and ensured THAT FRANCE WOULD NO LONGER BE A COLONIAL POWER IN NORTH AMERICA.
Explanation:
Louisiana a region of the French colony of New France that was established in 1682, that went from the Great Lakes to the Gulf of Mexico, between the Rockies and the Mississippi River.
This area was exploited from the French colony of Saint Domingue, today Haiti. That is why, when it became clear that the Haitian Revolution implied the independence of that country, the French government of Napoleon decided to sell Louisiana, since it could not defend it and to raise money to finance its wars in Europe.
Although the opposition to President Jefferson opposed the purchase, it was finally carried out, expanding the territory of the United States to almost double what it had prior to the purchase.
