October 12, 2008 9:48 am Presidential Candidates Take Fight to Battleground States With Wall Street recording its worst week ever and stocks tumbling worldwide on Friday, the economy continues to be front and center on the campaign trail. US & World Videos 2:03 Does Shakira still believe in love following Gerard Piqué split? 1:36 O.J. Simpson's cause of death revealed 25:57 WATCH: ‘Changing Climate' highlights the Philly-area residents who are combatting climate change 2:36 Super dad makes Mario-themed obstacle course for son's birthday 4:17 How the Philadelphia Union became the sustainability champs of the MLS
