FILE - In this March 1, 2012 file photo, President Barack Obama speaks in Nashua, N.H. Perhaps no presidential battleground will test the leanings of critical independent voters more than the ?Live Free or Die? state, the launching pad for Mitt Romney's White House bid. President Barack Obama won New Hampshire handily four years ago, but the former Massachusetts governor's ties run deep in a state that has vacillated between Republicans and Democrats in recent years. (AP Photo/Jim Cole, File)