Getting a Head Start - While President Obama and Mitt Romney will have to wait until their first debate on Oct. 3 to trade barbs in person, their campaigns have been fiercely battling for the support of nine battleground states, make-or-break states where neither major party has overwhelming support. Keep reading for a breakdown of battleground states participating in early voting. —Britt Middleton (Photos from left: AP Photo/Mark Lennihan, Allan Tannenbaum-Pool/Getty Images)