To all Americans
VOTE! But if you don't like the candidates on the ballot don't vote for them, I don't care if you write in Bernie Sanders or your pet hamster but VOTE.
The last USA presidential election had something like a third of the registered voters casting a ballot. That means that only slightly more than 1/6 the voting population of the USA voted for the current POTUSA who now claims the "Mandate of the majority".
Sure a Dem or Rep will still get enough of a majority to get elected but if they only got 15% of the total votes it would kind of get the point across that most US citizens don't like them.
Remember: Your vote is like a coupon for a free dinner at your favorite restaurant. You only waste it if you DON'T use it.