WASHINGTON--There are a lot of stories about White House hopeful Sen. Barack Obama (D-Ill.) going after chief rival Sen. Hillary Rodham Clinton (D-N.Y.) over Iran. The Atlantic's Marc Ambinder has the best explanation and analysis on this LINK

Off the daily news peg.... Scott Helman, the Boston Globe's Obama specialist, has a long, good read about the early Obama years in Chicago and how they defined him. LINK

Bloomberg's Heidi Przybyla and Julianna Goldman have an interesting story on how "one of the few contests so far where Democrat Barack Obama has bested Hillary Clinton is the Sister Souljah primary. LINK