Passed by 10 votes: Sequoyah, the 46th State.
After the Great North American Revolt was eventually put down in 1786 with massive loss of life on both sides, including colonial leaders such as George Washington, Thomas Jefferson, and John Adams, Parliament agreed to a partial devolution of powers to the colonies along with parliamentary representation in exchange for legal taxation and the permanent establishment of a British Army of North America.
However, Britain and the colonies were badly damaged, and despite the revolt's ultimate failure, it still inspired a successful French Revolution. George IV was deeply unpopular as he took over from his recent deceased father and due to a crippled economy, food shortages, and a more repressive style of government, a new revolt began in the north of England, quickly spreading across the islands. The colonies revolted once more and the monarchy finally collapsed altogether in 1797. George IV was forced to abdicate, and though he was not put to death like his unfortunate French counterpart years before, he was allowed to leave for Hannover. The monarchy was formally abolished and republics were declared in England, Wales, Scotland, and Ireland.
Meanwhile, the 2nd North American Revolt descended into civil war among competing factions, while a mass slave uprising overturned the established order in the South. Finally, it was General Alexander Hamilton who came out on top leading a diverse coalition of urban merchants, poor white landowners, the newly freed black population and several Native American confederations that won out and formed a new government based in New York.
The constituent parts of the new country, officially named the United North American States, coalesced around Hamilton, and while allowing a great amount of autonomy to the new states, several of which were Native American confederations that held onto their ancestral lands and new states founded among the remains of the formerly overlarge southern colonies. Hamilton centralized the military and called for limited federal taxes be paid by all North American citizens, along with providing for universal suffrage of all men (women would only get the vote in 1835).
The admission of a 46th state, that of Sequoyah, that was carved along the Mississippi River by Cherokee American settlers was a complicated matter as it caused further provocation of the Spanish colony of Luísiana. The Spanish Cortes, which much preferred to have a large buffer territory along the east bank of the Mississippi, issued a warning that a new state along the Mississippi River border would be considered an act of war, but it's admission as the 46th state was passed by a narrow margin of 10 votes.
The War of the Californian Succession