Final answer:
John Adams became unpopular with his own party due to his decisions and criticism from Alexander Hamilton.
Step-by-step explanation:
John Adams became unpopular with his own party for several reasons. One of the main reasons was his decision to settle with France and pardon those involved in Fries's Rebellion, which was disliked by his own party. Additionally, Adams' party was unhappy with the emergence of a standing army and the passage of the Alien and Sedition Acts. Furthermore, Alexander Hamilton, a prominent Federalist, criticized Adams and leaked a report stating that Adams did not have a talent for administration and had character defects that made him unfit for the office of chief magistrate.