Letter: Where is evidence of this voter fraud?

In my response (7/2) to Dean Hill’s letter (6/29), I asked how any individual would prove citizenship if required to do so to vote. Bonnie Williams (7/4) offered her naturalization papers or passport; her husband would offer his birth certificate or passport. Passports are expensive and requiring one to vote could be construed as a poll tax, which is unconstitutional as per Amendments 14 and 24. The Williamses would therefore be required to visit their safe deposit box and have their birth certificate or naturalization documents with them whenever they voted (or, in Arizona, anytime law enforcement wanted proof of their citizenship). Is it practical and reasonable to expect every American voter to produce such documentation? Would this encourage voting? As an aside, is there any evidence anywhere of rampant voter ID fraud?

— Ken Landfield