Answer:
The Hartford Convention
Explanation:
"This mostly Federalist convention in New England ended up suggesting some constitutional amendments but was alleged to consider the secession of New England from the Union and a separate peace with Britain. After the war the convention was widely viewed as an act of treason and a black mark on the reputation of the Federalist party."
StackExchange - History
Answer:
They opposed it because isolationist sentiment was growing, and many people feared American involvement in another war.
Explanation:
The people did not want another World War and one was already enough. Sadly enough there was World War 2 in Franklin Delano Roosevelts term.
