Answer :

They had been losing support for a while and were only strong in New England. The final blow came with the War of 1812 where the United States went to war against England, which the Federalist Party opposed.

Answer:

The party ceased to exist at the end of the War of 1812. Numerous Federalists opposed the war because many of these men earned their living through trade. The conflict hampered the Federalists' ability to exchange with England.

Explanation:

This Party in particular opposed war. Hope this Helps