Senate Republican leader Mitch McConnell of Kentucky walks to his office to meet with new GOP senators-elect at the Capitol on Wednesday. J. Scott Applewhite/AP hide caption

itoggle caption J. Scott Applewhite/AP

State Reps. Barry Moore, Joe Hubbard, Rod Scott and Merika Coleman study a map of the proposed redistricting plan in May 2012 following a meeting of the Legislative Committee on Reapportionment at the Alabama Statehouse in Montgomery, Ala. Dave Martin/AP hide caption

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In this May 12, 2009, photo, Jonathan Gruber, professor of economics at the Massachusetts Institute of Technology, participates in a Capitol Hill hearing on the overhaul of the heath care system in Washington. Pablo Martinez Monsivais/AP hide caption

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The question before the Supreme Court Wednesday is: Did Alabama's Republican-dominated Legislature rely predominantly on race or on partisanship when it was redrawing its districts? Carolyn Kaster/AP hide caption

itoggle caption Carolyn Kaster/AP

A Malaysian flag sits on a table among other flags during a news conference at the Trans-Pacific Partnership Free Trade Agreement talks in July 2012 in San Diego. Nearly two and a half years later, the deal remains incomplete. Gregory Bull/AP hide caption

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Former President George W. Bush (right) and his father, former President George H.W. Bush, wave as they leave a family wedding in Washington, D.C., in May 2006. Normand Blouin-Pool/Getty Images hide caption

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