They are clearly stating that D.C. didn't vote for Trump because they aren't uneducated rubes, and yet DC has the highest percentage of population in any US territory of students that can't read or do math at a 4th grade level (only 17 percent) according to the US Department of Education (
https://www2.ed.gov/about/reports/annual/state-of-states/index.html). They are third from dead last on how many of their students graduate from high school.
So when they tell you how educated DC people are, remember it's almost 100% transplants as people born and raised in DC apparently don't learn to read or do math above a 4th grade level (which is still somehow good enough for 60% to graduate high school and many to go to college). And these DC kids still somehow get accepted into college and get degrees, but let's not speculate on WHY they are accepted to college without being able to read or do basic arithmetic.
It's like when they say big cities have less crime when they decide to classify nothing as a crime and not arrest anyone.