Of course they can. But it is acts as a deterrent to vote and is much harder for campaigners and canvassers.
I asked because the contention was regarding it being a recent phenomenon. It's neither recent nor common. You are correct though it was an unnecessary side path that got very crowded.
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Prior to 1974 it was much more common to have elections in the colder months than it was in the warmer ones
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As you say it's irrelevant regarding the current discussion. Wishing I hadn't even asked

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