To fight hyperpartisanship and redistricting aimed at keeping politicians safe in their district, some states are experimenting with new primary voting systems. Jae C. Hong/AP hide caption

itoggle caption Jae C. Hong/AP

Demonstrators march toward the U.S. Capitol on Saturday to demand that Congress investigate the National Security Agency's mass surveillance programs. Fang Zhe/Xinhua/Landov hide caption

itoggle caption Fang Zhe/Xinhua/Landov

The Capitol is seen under an overcast sky at dawn on Monday. J. Scott Applewhite/AP hide caption

itoggle caption J. Scott Applewhite/AP