Rep. Carol Shea-Porter rode a Democratic wave that propelled her to office four years ago. Now, says analyst Andrew Smith, "the Republican wave of anger against the Obama administration and general dissatisfaction with the state of the economy may be the wave that takes her out." Cheryl Senter/Pool, AP hide caption

itoggle caption Cheryl Senter/Pool, AP

The DREAM Act has been talked about for more than a decade. At this 2004 rally in Washington, D.C., supporters held a mock graduation ceremony. Alex Wong/Getty Images hide caption

itoggle caption Alex Wong/Getty Images