How does the U.S. electoral college system work? | Explained

How is an electoral college formed? What is its role in the U.S. presidential election? Who are ‘faithless’ electors? Which is the state with the largest number of electoral votes?

How does the U.S. electoral college system work? | Explained
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How is an electoral college formed? What is its role in the U.S. presidential election? Who are ‘faithless’ electors? Which is the state with the largest number of electoral votes?