Obama and Romney Battle Down to Wire

After more than one million television ads, countless appearances and three contentious debates, the 2012 presidential election remained on a knife’s edge with both candidates seeking to shore up support in states crucial to their chances Tuesday.
President Barack Obama cheered on backers in Wisconsin, Ohio and Iowa on Monday, evidence that his campaign aimed to build a firewall in the Midwest to try to block his Republican rival. He plans to await the election returns at his base in Chicago.
Mitt Romney swooped through four battleground states—Virginia, Florida, Ohio and New Hampshire—where the Republican needs to do well to