Arizona congressional districts, approved in 2012.
The U.S. Supreme Court heard arguments Monday over a challenge to how Arizona draws boundaries for congressional districts.
The court heard lawyers representing Republican legislators and the state Independent Redistricting Commission disagree on the constitutionality of the redistricting process.
Arizona voters in 2000 approved the independent redistricting commission for drawing the lines, giving it what had been a partisan legislative function.
Legislators lived with it in 2001 for the redistricting that decade. But after the 2011 redistricting and the 2012 election in which Democrats won five of the state's nine congressional seats, Republican legislators sued over the constitutionality.
In 2014, Republicans won five of the nine seats.
Read the SCOTUSblog.com analysis of Monday's arguments here.
Read the transcript of the Supreme Court arguments on AZ redistricting here
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