Easy to understand. The President, representing the Republic of States, is elected by the States. Each State has a specified number of electors – the combined total of Senators (2) and Representative (varies by State). This prevents a densely populated area from electing the President, allowing better representation of the entire Nation. The Congress is elected by the people of each State, to represent that State (Senate) and district within that State (House).
Only problem – there are a finite way of doing things “right,” but there are an infinite way of doing things wrong!