And Pew Research did its best to lie about them in this study from 2018, saying "nonvoters were more likely to be younger, less educated, less affluent and nonwhite. And nonvoters were much more Democratic".
Pew's own graph and statements show this not to be true.
Nonvoters were more likely to be white, 52% vs. 46%, and fully 53% of them did not prefer Hillary Clinton in 2016: "37% expressed a preference for Hillary Clinton, 30% for Donald Trump and 9% for Gary Johnson or Jill Stein; 14% preferred another candidate or declined to express a preference".
The American left fears this potential white vote, which is why it must lie about it, minimize it, drug it, demoralize it, and vilify it.
It is why you hear so much about mythical white supremacists in the news, and mythical violent white militias causing mayhem everywhere, even as media and Democrats deny Antifa is a thing or that BLM is violent. Meanwhile those leftist groups, anarchist and communist, are getting away with inciting and actually causing riots, arson, looting, injury, and murder on a previously unimaginable scale, now approaching a cost to the economy of $2 billion. Their foot soldiers are the half-educated, indoctrinated, young, poor products of America's unionized public schools.
The left demonizes whites in order to neuter them, knowing their deep-seated American cultural propensity for guilt derived from Christianity. It plays on that guilt and perverts it chiefly by outlawing religion in the schools and teaching white responsibility for slavery to your children qua white instead. Its greatest fear is whites who will no longer accept that new religion and that guilt and fight back. And it particularly fears any politician whose specific appeal is to them.