Why is the electoral college biased for the Democrats?

It is CLEARLY in favor of the Democrats (just like 90% of the mainstream media as well). why is this? You have blatantly obvious LIBERAL DEMOCRATIC states such as California (55 votes) and New York (31 votes) which each gets ridiculous amounts of votes compared to nearly ALL of middle America. Middle American states which tends to lean more in favor of Republicans only average about 3-4 votes per state.