On the road and short on time, so forgive the lack of background... Politico tells the story --- though they fail to use the word "caging" because, well, it doesn't make the GOP look so great, and that's what the main interest of Politico seems to be in just about everything they do. They do, however, liberally use the Orwellian phrase "ballot security" instead, as the GOP no doubt appreciates.
These grafs from Politico, summarizing the RNC's rejected argument for moving to throw away the national consent decree they were forced to sign in the 80's, after getting busted caging minority voters from the voter rolls (illegally suppressing their vote) are rather amusing...
The RNC contended that the consent decree had been interpreted too broadly and made it tougher for Republicans to ensure an even electoral playing field. Plus, it said it had no incentive to intimidate minority voters, pointing to its own election of Michael Steele, who is African-American, as chairman, and asserting that Obama’s election meant existing voting rights laws would be adequate to protect minority voters without the decree.
U.S. District Court Judge Dickinson Debevoise also seems to have found the argument laughable as well, pointing out in his decision that:
One victory for the RNC in the judge's ruling, however, is that the consent decree will now be sunsetted in eight years. Furthermore, only the DNC themselves will be allowed to bring a complaint under the decree when the RNC next attempts to cage voters --- and they certainly will.
[DNC Chairman Tim Kaine] called the ruling "a victory for all Americans who believe that every citizen should have the right to vote and have their vote counted. It also represents a resounding repudiation of the Republican Party's trumped up claims of voter fraud."