Candidates Barack Obama and Mitt Romney remain tied in key battleground states a day before Election Day in the United States
US Presidential Race In Its Home Stretch
۵
A supporter listens to President Obama at a campaign event at Austin Straubel International Airport in Green Bay, Wisconsin, November 1, 2012.
۶
Wearing a mask on Halloween, Carol Heye of Riverview, Florida, shows her support for Mitt Romney as he campaigns in Tampa, Florida, October 31, 2012.
۷
Supporters listen to Republican Presidential candidate Mitt Romney during a rally at the Veterans Memorial Coliseum in Marion, Ohio, October 28, 2012.
۸
Vice President Joe Biden speaks at a campaign rally at the Municipal Auditorium in Sarasota, Florida, October 31, 2012.