AP's Pablo Martinez Monsivais says:
"When covering events where President Barack Obama is interacting with the public, a photographer has to watch the president’s every move and notice people’s reactions when he’s suddenly inches away. One thing I noticed at this particular rally in San Francisco is that people really wanted to touch him, and a few ended up hugging him. I loved the emotional reaction of the woman you see embracing him in this image — it was as if she and the president were family, and this was some sort of reunion."
President Obama told supporters on Thursday that "change turned out to be a lot tougher than expected." Read the full story here.