Police stand guard in front of the U.S. Supreme Court on Wednesday as the justices hear arguments on the constitutionality of the federal Defense of Marriage Act.
Jewel Samad/AFP/Getty Images
A new NPR poll shows the outcome of the Nov. 6 election is too close to call. Mitt Romney leads President Obama nationwide; Obama leads Romney in key battleground states. Both leads are within the poll's margin of error.
Pablo Martinez Monsivais/AP