First Continental Congress, I believe
He felt that only he had the skill and experience to guide the nation through the war.
The correct answer is the Louisiana Purchase.
While the President has the power to negotiate treaties, Jefferson likely got quite a bit ahead of himself when the land was purchased before the consent of the United States Senate.
Furthermore, the Federalists believed that the acquisition of territory itself might be unconstitutional.
It came from Texas that is all I know sorry