Voter IDs?

Picture Ids for voting: Seems like common sense to me, especially with illegals becoming more of a percentage of the population in certain areas. Frankly, I find it very disturbing that a picture ID hasn’t been required all along! There's something very eerie about showing up at a polling place, being asked for your address, but never being asked to show identification.

You need one when you make a credit card purchase; One can’t get on an airplane these days without one. Heck, even my Costco American Express card has my smilin’ mug on the back of it.
What’s the big deal among the Democrats with this issue? Aren’t they concerned with possible voter fraud, or are they more afraid that such a requirement will cause them to lose some Latino (possibly illegal) voters?

Or is it something else?