Final answer:
Some Federalists criticized Adams's refusal to declare war on France because they believed it would weaken the Democratic Republicans and because they thought it would enable the United States to expand.
Step-by-step explanation:
Some Federalists criticized Adams's refusal to declare war on France for two main reasons. First, they believed that a war would weaken the Democratic Republicans, who were their political opponents. Second, they thought that a war would enable the United States to expand its territory. These were the two primary reasons why some Federalists criticized Adams's decision.