According to a the Washington Post's The Supreme Court will examine partisan gerrymandering in 2017. That could change the voting map.:
One thing that distinguished Whitford from the many previous unsuccessful challenges was that it was based on a First Amendment freedom of association test rather than a 14th Amendment equal protection test.
The quote refers to Gill v. Whitford.
According to Wikipedia's artice on Freedom of Association:
Freedom of association encompasses both an individual's right to join or leave groups voluntarily, and the right of the group to take collective action to pursue the interests of its members. Freedom of Association, The Essentials of Human Rights describes the right as coming together with other individuals to collectively express, promote, pursue and/or defend common interests.
How does the argument go that gerrymandering restricts freedom of association? Is this a new argument, or has it been used in the context of gerrymandering previously?
below: Illustration of gerrymandering from here.