National Review: How Federalism Thwarts Dystopia
About a third of the U.S. population lives in just four states (California, Texas, Florida, and New York), but our system of government ensures that a handful of populous states cannot dominate the affairs of the entire nation. South Dakota soybean farmers have their own interests, distinct from — and sometimes rivalrous to — those of Wall Street financiers or Silicon Valley entrepreneurs or low-income people in San Antonio. Federalism, properly understood and properly implemented, gives them a chance to say “Hell, no!” (or maybe just “No, thanks!”) to policies and laws reflecting values and priorities at odds with their own.
NWF Daily News: Electoral College prevents domination by a few states
The Electoral College is designed to keep a few states from dominating the rest.
Originally that was New York and Pennsylvania. The concept is still the same today, keeping in mind we are a Representative Republic, not a Democracy.