CONCORD, NC - OCTOBER 18: People wear masks depicting Democratic presidential nominee Sen. Barack Obama (D-IL) and Alaska Governor Sarah Palin during a campaign rally for Republican presidential nominee Sen. John McCain (R-AZ) at the Cabarrus Arena and Events Center October 18, 2008 in Concord, North Carolina. With 17 days left before the U.S. presidential election, John McCain will campaign in North Carolina, Virginia, Ohio and Missouri over the next three days.