The pull factor that accounted for much of Chinese immigration to the United States in the mid 1800 was the fact that there were lots of available jobs.
Conventionally, each state receives in the electoral collage THE NUMBER OF ELECTOR THAT IS EQUAL TO THE TOTAL NUMBER OF SENATORS AND REPRESENTATIVES IT HAS.
An exception is Washington DC, which always has the same number of electors as that of the state that has the least population of people in US.
Art, math, science, maybe psychology