Complex sentence: What finally finished off the Federalist party was Hartford Convention of 1814, in which five New England states gathered together to discuss several constitutional amendments necessary to protect New England's interests in regards to the blockade of their ports by the British during the War of 1812.
Split into simpler sentences: What finally finished off the Federalist party was Hartford Convention of 1814. In which five New England states gathered together to discuss several constitutional amendments necessary to protect New England's interests in regards to the blockade of their ports by the British during the War of 1812.