Based on data from the United States Census and renowned Cook Partisan Voting Index (CPVI), congressional districts with more educated residents are more likely to pledge their electoral votes to Republican presidential
candidates. Conversely, congressional districts with less educated residents are more likely to pledge their electoral votes to Democratic presidential candidates.
As demonstrated below, there is a statistically significant positive correlation between the percentage of residents in each congressional district who are high school graduates (or higher) and support by those districts for Republican presidential candidates. Comparatively, there is a statistically significant negative correlation between the percentage of residents in each congressional district who are high school graduates (or higher) and support by those districts for Democratic presidential candidates.
As a point of probable interest, seven of the ten most educated congressional districts are partisan Republican districts and three are partisan Democratic districts. All ten of the least educated congressional districts are partisan Democratic districts. As a preliminary matter, the following is a list of these twenty congressional districts, their general geographic areas, high school (or higher) graduation percentages, and their Cook Partisan Voting Index (CPVI) values:
1. Colorado-6 (Littleton-Castle Rock, 96%, CPVI Republican +8);
2. Minnesota-3 (Edina-Maple Grove, 94.7%, CPVI Republican +0);
3. California-30 (Beverly Hills-Malibu, 94.2%, CPVI Democrat +18 );
4. Washington-1 (Redmond-Edmonds, 94.1%, CPVI Democrat +9);
5. Wisconsin-5 (Waukesha-West Bend, 93.6%, CPVI Republican +12);
6. Minnesota-2 (Apple Valley-Lakeville, 93.6%, CPVI Republican +4);
7. Massachusetts-10 (Cape Cod, 93.6%, CPVI Democrat +5);
8. Georgia-6 (Dunwoody-Canton, 93.5% CPVI Republican +19);
9. Minnesota-6 (Woodbury-St. Cloud, 93.4%, CPVI Republican +7);
10. Illinois-13 (Downers Grove-Orland Park, 93.4%, CPVI Republican +1)
1. Texas-29 (South Houston-Baytown, 53%, CPVI Democrat +8);
2. California-34 (East Los Angeles, 54.4%, CPVI Democrat +22);
3. California-20 (Fresno-Lamont, 55.2%, CPVI Democrat +5);
4. California-47 (Garden Grove-Santa Ana, 55.8%, CPVI Democrat +4);
5. New York-16 (Bronx, 58.5%, CPVI Democrat +41);
6. California-31 (Northeast Los Angeles-Hollywood, 59.2%, CPVI Democrat +29);
7. Illinois-4 (Chicago-Cicero, 61.7%, CPVI Democrat +32);
8. Arizona-4 (Phoenix-Guadalupe, 63.6%, CPVI Democrat +13);
9. Texas-15 (Corpus Christie-McAllen, 64.7%, CPVI Democrat +3);
10. Texas-28 (Laredo-San Antonio, 65%, CPVI Democrat +0).