I think voter turnout is low for 2 reasons:

1. Tuesday voting. It's a work day. People have to work. They aren't going to skip work (and maybe jeopardizing their food and shelter) just to go vote.

2. They're angry and apathetic. People vote for change candidates and people that promise to disrupt Washington. What does that tell you?

People don't like their choices. They feel like the candidates barely (if at all) represent them or their interests. They disapprove of Congress and they have little confidence in government (and have on both points for quite a while).

So some of them decide to stay home instead.

For 1, we have mail-in ballots and early voting. And for 2, it really doesn't matter how easy you make it to vote. That's not the problem.