Article Photos: Political ads blitz viewers, risk voter turnoff 1/2

  This image provided by the Obama For America campaign shows a still frame made from a video ad entitled "Only Choice." One analysis estimates the campaigns and independent groups will have spent about $1.1 billion on television advertising this year, with $750 million already allocated in states likely to determine the outcome of the presidential contest. Obama’s team is running an ad warning that Romney would cut Medicaid money for nursing home care. (AP Photo/Obama for America)