First, let’s call it what it is. The burgeoning battles over state redistricting and voter ID laws — and the larger fight over a key part of the Voting Rights Act itself — are all cynical expressions of the concerns many conservatives (of both parties) have about the future of the American electorate. The Republican lawmakers who are leading the fight for the restrictive legislation say they are doing so in the name of stopping election fraud — and, really, who’s in favor of election fraud? But the larger purpose and effect of the laws is to disenfranchise Hispanic voters, other minorities, and the poor — most of whom, let’s also be clear, vote for Democrats. Jonathan Chait, in a smart recent New York magazine piece titled “2012 or Never,” offered some numbers supporting the theory. “Every year,” Chait wrote, “the nonwhite proportion of the electorate grows by about half a percentage point — meaning that in every presidential election, the minority share of the vote increases by 2 percent, a huge amount in a closely divided country.” This explains, for example, why Colorado, Nevada, and Arizona are turning purple instead of staying red. “By 2020,” Chait writes, “nonwhite voters should rise from a quarter of the 2008 electorate to one third. In 30 years, “nonwhites will outnumber whites.”