Politics

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For Democrats, the 2008 primary season has been the longest in recent memory, with no shortage of upsets, talk of momentum, and states defying parties to hold primaries earlier than ever. Three historians discuss the significance of 2008's lengthy primaries.

May 20

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Massachusetts Sen. Edward Kennedy has a malignant brain tumor, his doctors said Tuesday, a challenging health diagnosis for the iconic American political figure and the last surviving of the four famed Kennedy brothers.