I’m not the specific target of the question since my family always turns out to vote, but I’d imagine some of the big ones are people not knowing that they have a legal right in many states to take paid time off work to vote, general apathy, voter suppression making it very difficult to vote in some areas, and given the swing in turnout between presidential and non presidential elections, a lot of people who only pay attention to the presidential elections because they get nationwide coverage dispite your local and district votes bro by a whole lot more important when it comes to effects on your life and keeping extremists from implementing their policies.