03/28/2008 02:45 am ET | Updated May 25, 2011

Supermarket Sandwich Platters And Snow Shovels: Inside The Massive Iowa Ground Game

Senator Barack Obama is on the hunt for Iowans who have never participated in the state's presidential caucuses, including independent voters under 50 and students who will be 18 by the general election.

Senator Hillary Rodham Clinton is searching for Iowans who have skipped the caucuses in the past and who, because of age, sex or other characteristics, seem likely to support her, starting with independent women over 65 and under 30.

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