A policy memo by Sen. Hillary Clinton's one-time chief strategist challenging Sen. Barack Obama's "American roots" could make it difficult to close any remaining gaps between the former rivals, the magazine writer who revealed the memo said Tuesday.
links
- Penn memo could keep Clinton-Obama rift open (http://rss.cnn.com/~r/rss/cnn_allpolitics/~3/36303 1524/index.html)

