Connecticut

As others pointed out this is not very accurate, but you do have a point. Columbine was an aberration. Those who were in school at the time had never imagined such a thing. Sort of like how before 9/11 nobody really had an image of terrorists doing something as brazen as hijacking a bunch of airliners and simply crashing them into buildings.

It is very accurate to say that a massive cohort of people who grew up very familiar with the idea of school shootings, for whom Columbine would have been routine, rather than aberrant, and that they are now more fully aging into the electorate.

All evidence points to this cohort being extremely liberal and committed to science, and that fills me with hope.