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Liberals are all for "choice" when it comes to killing babies but not for choosing whether to join a union or whether to hold a Christian opinion on gay marriage.
That's the way we think today, but it's actually a relatively new concept. It didn't come into USA till well after the Civil War, with the last state going to it in 1891.
Ballots were cast publicly for over half the history of this country, one reason elections so often ended in riots.