Here are the presidential campaign headlines for Wednesday at lunchtime from The Associated Press:

Obama beats Clinton in racially polarized Mississippi Democratic primary; Pennsylvania is next

AFL-CIO calls McCain ’Bush 3,’ targets his record on labor, economic issues
Obama accuses Ferraro of ’slice and dice’ politics

From April to June contests, Democrats do the math in planning strategy

Obama camp, Florida congressional delegation raise questions about possible vote-by-mail
Click for details on the headlines.

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