The Campaign Trail - Oct. 6 - Oct. 12 (23 images)

Democratic Presidential Nominee Sen. Barack Obama (IL) participates in the second presidential debate, moderated by journalist Tom Brokaw, at Belmont University in Nashville, Tennessee, on October 7, 2008. (UPI Photo/Frederick Breedon IV)

Republican Presidential Nominee Sen. John McCain (AZ) arrives at the second presidential debate, moderated by journalist Tom Brokaw, at Belmont University in Nashville, Tennessee, on October 7, 2008. (UPI Photo/Roger L. Wollenberg)

Democratic presidential candidate Barack Obama waves to the crowd following his morning rally outside the Mayfair Dinner in northeast Philadelphia on October 11, 2008. (UPI Photo/John Anderson)

Republican Presidential Nominee Sen. John McCain (AZ) greets members of the audience after the second presidential debate, moderated by journalist Tom Brokaw, at Belmont University in Nashville, Tennessee, on October 7, 2008. (UPI Photo/Roger L. Wollenberg)