my understanding is that the left's response is "we don't mind voter ID as long as it's automatic, free and easy to recieve. So far such a scheme has not been presented/crafted."
speculation - I think if a such a voter-ID bill was proposed, which was in fact easy, free and automatic. The repubs would vote it down.
Your understanding is incorrect. The left's response is that Voter ID is racist because minorities have trouble acquiring state issued ID. Nevermind that 75% of Americans want voter ID, and that were such a program to be implemented you can be damn sure that "community organizers" would have a program up and running to get anyone an ID that wants one.
The left's opposition is based squarely on the simple fact that whether they're cheating or not, they are more likely to lose votes from such a law than to gain any while the right is more likely to maintain their current totals. Even though Democrats are the more popular party, the margins are razor thin.
Chances are if Voter ID passed, the totals wouldn't change at all. Voter fraud is supposedly rare, and despite their racist low expectations for black people democrats would find that they're capable of acquiring a photo ID after all. But why take the chance when you can grandstand about democracy?