On Friday, Senators McConnell and Reid discussed the FEC nomination situation. The discussion is available here thanks to C-SPAN’s online archives. Click on Senator McConnell’s remarks of 9:36 a.m. (If that link doesn’t load you’ll have to visit the main archives site and find the June 20th session of the Senate.) His discussion of the FEC starts 3:58 into the video. Or you could read it in the Congressional Record when they post Friday’s issue.
The opinion Senator McConnell referred to is DNC v. FEC.