At the Wall Street Journal:

Millions more Americans will be required to show photo identification when they head to the polls in four states in 2012, headlining the welter of new laws across the nation that take effect with the turn of the year.

Kansas, Rhode Island, Tennessee and Texas will require voters to prove their identities at the ballot box, bringing the total number of states that require some form of voter identification to 30, according to the National Conference of State Legislatures, a bipartisan group that provides research and data to state governments.

…”Voter ID was definitely a hot issue, and the debate around it was close to boiling over,” says Meagan Dorsch, the NCLS’s director of public affairs. “I think that in 2012 we could be looking at a flurry of lawsuits over voter ID laws passed in 2011.”