The electors, aka the Electoral College (though that term is not used in the Constitution). The US Constitution specifies the number of electors and the way they are to be apportioned among the states. It doesn't explicitly state how the states are to choose their electors. At present, all state choose their electors based on the results of the popular election; in most states it's on a "winner take all" basis, but they're not required to do it that way.
by the apportioned population of the states
The Electors meet in the capitols of their respective states.
Electors from the states.
The Congress may determine the time of choosing the electors and the day on which they shall give their votes; which day shall be the same throughout the United States.
the electors shall meet in their respective states, and vote by ballot for two persons
The electors, aka the Electoral College (though that term is not used in the Constitution). The US Constitution specifies the number of electors and the way they are to be apportioned among the states. It doesn't explicitly state how the states are to choose their electors. At present, all state choose their electors based on the results of the popular election; in most states it's on a "winner take all" basis, but they're not required to do it that way.
In 1864 there were 242 seats that had been apportioned to the states after the 1860 census, including 58 seats that were vacant because they were apportioned to southern states (leaving 184 seats occupied).
apportioned population of the states
popular vote
popular vote
Apportioned, not Prorogued