"The GOP's Redistricting Dilemma."  Here.

"Democrats are pioneering new ways to collect big, unregulated donations for redistricting expertise and legal challenges. A growing redistricting reform movement, coupled with a spike in public interest, has given civil rights groups fresh tools with which to engage. And for the first time in decades, voting rights questions will land before a Democratic-appointed Justice Department."

Of course National Journal's conclusion isn't entirely accurate.  States can go to district court to have plans approved, a choice which has served Georgia well on other matters recently.  Texas is also considering going straight to court and bypassing DOJ.  The same choice is available with redistricting plans.