People who don’t vote either cannot vote due to discrimination or don’t vote because they are neutral towards the winner:
Overall, 10% of Americans are what we call Bystanders, or the politically disengaged, according to Pew Research Center’s Political Typology report. None of this cohort say they’re registered to vote, and none say they follow government and public affairs most of the time.
People who don’t vote either cannot vote due to discrimination or don’t vote because they are neutral towards the winner:
https://www.pewresearch.org/short-reads/2014/07/07/1-in-10-americans-dont-give-a-hoot-about-politics/
If you don’t care about politics, you are not opposed to Trump.