Sen. Jeanne Shaheen (D-N.H.) in the U.S. Capitol building May 14, 2013. Groups are creating ads in New Hampshire to attack Shaheen 10 months before the midterm congressional elections. Allison Shelley/Getty Images hide caption

itoggle caption Allison Shelley/Getty Images

After casting their final votes of a session in which few laws were passed, members of Congress leave for a five-week recess. J. Scott Applewhite/AP hide caption

itoggle caption J. Scott Applewhite/AP

Bitcoins have gone from an Internet oddity to much more. The FEC is now considering allowing the virtual currency to fund some political campaigns. Rick Bowmer/AP hide caption

itoggle caption Rick Bowmer/AP