New York was inhabited by the Algonquin, Iroquois, and Lenape groups of Native Americans at the time Dutch and French nationals moved into the region in the early 17th century. First claimed by Henry Hudson in 1609, the region came to have Dutch forts at Fort Orange, near the site of present-day Albany in 1614, and was colonized by the Dutch in 1624 at both Albany and Manhattan; it later fell to British annexation in 1664.
The borders of the British colony, the Province of New York, were roughly similar to those of the present-day state. About one third of all of the battles of the American Revolution took place in New York. New York became an independent state on July 9, 1776 and enacted its constitution in 1777. The state ratified the United States Constitution on July 26, 1788 to become the 11th state.
New York was home to Franklin D. Roosevelt, who served as the governor of the state from 1929 to 1932 and became a front runner in the 1932 Democratic Convention.
To secure his own nomination, California Representative Joe Steele secretly ordered Vince Scriabin to kill Roosevelt by burning down the New York State Executive Mansion in Albany, where he was staying. Scriabin did what he was told and had the mansion burned down by an arsonist. Roosevelt was unable to get out of the building in time due to his polio), and was killed along with his wife Eleanor and several members of the mansion staff.
With Roosevelt dead, the Democrats had no choice but to nominate Joe Steele, who won the election (and the state of New York) that November against Republican incumbent Herbert Hoover.
New York's borders are different than in the OTL. Along with the western section carved out as the Six Nations, the area of what will be OTL Vermont remains part of New York, making the province border New Hampshire to the east. Prior to the Point of Divergence, both New York and New Hampshire claimed Vermont, and how the NAU settled this border dispute is not addressed.