Iowa: McCain Cuts Obama Lead in Half

Date McCain Obama
8/07/2008 41% 46%
7/10/2008 38% 48%
6/10/2008 38% 45%
5/13/2008 42% 44%
3/31/2008 42% 46%
2/18/2008 41% 44%

Rasmussen Reports

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