Correlation between education and voting in the USA

Here's an interesting little rabbit hole to go down. Based on US census data, the best-educated American states are:

1. Massachusetts
2. Colorado
3. Vermont 
4. Marylamd
5. New Jersey 
6. Virginia
7. Connecticut
8. New Hampshire
9. New York
10. Washington

The least-educated states are;

1. West Virginia
2. Mississippi
3. Arkansas
4. Louisiana
5. Kentucky
6. Nevada
7. Oklahoma
8. Alabama
9. Indiana
10. New Mexico

Well, maybe you could have guessed most of those. But what's interesting is the correlation of these results with election results.

ALL of the top ten educated states vote Democrat. And ALL of the top ten least educated states voted Republican.

Of course, it could just be coincidence.