I just looked at the parent page to that link. Where's the ACLU? Only McConnell and the NRA are listed as having filed suits. The ACLU doesn't have anything on their website either. (Though they do have plenty of articles bashing John Ashcroft!) They're AWOL!
One thing concerns me: lack of injury in fact. Any constitutional attorneys out there who can make an argument for that? It appears that the case may not be ripe until next election cycle.
I guess a preliminary injunction may be issued if McConnell can show potential irreperable harm. Oh, well, this will make future Constitutional Law casebooks.