The Harvard Law Review often has excellent summaries of recent notable cases. The April 2013 issue has two summaries of note in the area of election law.
Fourth Circuit Holds that Ban on Corporate Direct Contributions Does Not Violate the First Amendment. United States v. Danielczyk, 683 F.3d 611 (4th Cir. 2012), cert. denied, No. 12-579, 2013 WL 656067 (U.S. Feb. 25, 2013), 126 Harv. L. Rev. 1707 (2013).
Eighth Circuit Grants Injunction Against Minnesota Reporting Requirement for Independent Corporate Political Expenditures. Minnesota Citizens Concerns for Life, Inc. v. Swanson, 692 F.3d 864 (8th Cir. 2012) (en banc), 126 Harv. L. Rev. 1715 (2013).