Answer:
Because he was a Strict constructionist, Jefferson initially worried that the Constitution did not grant the president the right to make such a deal with a foreign nation.
Step-by-step explanation:
He was worried about breaking the Constitution because he was a strict constructionist, meaning that he cared about respecting the institutions.
So
Because he was a Strict constructionist, Jefferson initially worried that the Constitution did not grant the president the right to make such a deal with a foreign nation.