Answer:
His failure to increase trade with the West Indies.
Step-by-step explanation:
John Quincy Adams was an American statesman, diplomat and lawyer who also served as the sixth president of the United States. Moreover, he was also the eight Secretary of State, served as ambassador, senator and member of the House of Representatives. Adams was an effective diplomat and politician, however, he was not particularly popular. One of the reasons why his popularity suffered was because of his failure to increase trade with the West Indies.