As it now operates: Each State is allocated a number of Electors equal to the number of its U.S. Senators (always 2) plus the number of its U.S. Representatives (which may change each decade according to the size of each State's population as determined in the Census).
The answer is Shay's Rebellion.
The crisis of the 1780s was most intense in the rural and relatively newly settled areas of central and western Massachusetts. Many farmers in this area suffered from high debt as they tried to start new farms. Unlike many other state legislatures in the 1780s, the Massachusetts government didn't respond to the economic crisis by passing pro-debtor laws (like forgiving debt and printing more paper money). As a result local sheriffs seized many farms and some farmers who couldn't pay their debts were put in prison. These conditions led to this first major armed rebellion in the post-Revolutionary United States.
Probably as for a trade route
The use of horses in their defense and war strategy enabled the Native Americans to better resist Spanish encroachments. Being more mobile, faster and more able conduct attacks and raids made the Native Americans harder for the Spanish to oppose.