Article Photos: Different debate tactics reflect changes in campaign landscape



President Barack Obama makes his closing argument during the third presidential debate with Republican presidential nominee Mitt Romney at Lynn University, Monday, Oct. 22, 2012, in Boca Raton, Fla. (AP Photo/David Goldman)

President Barack Obama makes his closing argument during the third presidential debate with Republican presidential nominee Mitt Romney at Lynn University, Monday, Oct. 22, 2012, in Boca Raton, Fla. (AP Photo/David Goldman)