The campaign trail - Oct. 13 - Oct. 19 (22 images)

A supporter of Republican presidential nominee Sen. John McCain (R-AZ) attends a campaign rally in Woodbridge, Virginia on October 18, 2008. (UPI Photo/Alexis C.Glenn)

Democratic presidential candidate Sen. Barack Obama (D-IL) stops to wave to a young fan before speaking to a crowd estimated at 100 thousand at a rally under the Gateway Arch in St. Louis on October 18, 2008. (UPI Photo/Bill Greenblatt)

Republican presidential nominee Sen. John McCain (R-AZ) greets supporters after he spoke at a campaign rally in Woodbridge, Virginia on October 18, 2008. (UPI Photo/Alexis C. Glenn)

Democratic presidential candidate Sen. Barack Obama (D-IL) speaks at a campaign rally at the Gateway Arch in St. Louis on October 18, 2008. (UPI Photo/Bill Greenblatt)