There have been a number of leaders, who profess to be Christians, that say that it is a sin to not vote.
No where in the Bible does it explicitly say that. They are adding to scripture. They become like the Pharisees.
There is nothing in the Bible that requires voting and nothing that prohibits voting.
Voting is a disputable matter!
Christians & Civil Government
Obama’s Inauguration and Rick Warren’s Invocation
Crusades for “Morality”, Political Action, Social Activism