Maybe voter fraud is "vanishingly rare", but that statement in the wikipedia article only links to a NYT article which says:

> Academic studies have repeatedly concluded that fraud at the ballot box — the sort that photo identification requirements might reduce — is already vanishingly rare.

With no citation.

Anyway, "vanishingly rare" could mean that fewer than 1% of votes are fraudulent, but those fraudulent votes could be concentrated in a handful of key counties thereby having a big impact. I'm not arguing in favor of tougher voter ID restrictions but rather in favor of educated discourse.