Who challenged the Judiciary Act?

A. John Adams

B. Thomas Jefferson

C. Alexander Hamilton

B. Thomas Jefferson

Explanation:

John Adams and Alexander Hamilton were both Federalists and supported the Judiciary Act.

Thomas Jefferson, however, was an Anti-Federalist, and opposed the legislation as he and other Anti-Federalists believed that the Federalists were attempting to use it to stack the courts in their favor.

B. Thomas Jefferson

President Thomas Jefferson did not want the judiciary to gain more power over the executive branch.