Article Photos: Presidential campaign is nice, and then again not



President Barack Obama steps to the microphone after being introduced by former President Bill Clinton, Tuesday, Sept. 25, 2012, at the Clinton Global Initiative in New York. (AP Photo/Mark Lennihan)

President Barack Obama steps to the microphone after being introduced by former President Bill Clinton, Tuesday, Sept. 25, 2012, at the Clinton Global Initiative in New York. (AP Photo/Mark Lennihan)