In Profile: 100 Years In US Presidential Races

(FILE PHOTO) In this composite image a comparison has been made between former US Presidential Candidates Barack Obama (L) and John McCain. In 2008 Barack Obama won the presidential election to become the President of the United States. ***LEFT IMAGE*** VIRGINIA BEACH, VA - OCTOBER 30: U.S. Presidential nominee Sen. Barack Obama (D-IL) speaks during a campaign rally at Verizon Wireless Virginia Beach Amphitheater October 30, 2008 in Virginia Beach, Virginia. Obama continues to campaign against Republican presidential nominee Sen. John McCain (R-AZ) as Election Day draws near. (Photo by Alex Wong/Getty Images) ***RIGHT IMAGE*** DAVENPORT, IA - OCTOBER 11: Republican presidential candidate Sen. John McCain (R-AZ) speaks to supporters at a campaign rally October 11, 2008 in Davenport, Iowa. McCain spoke to about 1,000 people at the rally. (Photo by Steve Pope/Getty Images)