PHILADELPHIA (Reuters) - Hammered by Hillary Clinton's claim he is not tough enough for the U.S. presidency, Barack Obama worked to show that he could "stand the heat" as he faced a possible defeat in Pennsylvania on Tuesday.
links
- Obama seeks to show he can "stand the heat" (http://feeds.reuters.com/~r/Reuters/PoliticsNews/~ 3/275735136/idUSN2230728720080422)

