Media Exposure Over Time

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	Jan. 6-11	Jan. 14-20	Jan. 21-27	Jan. 28-Feb. 3	Feb. 4-10
Barack Obama	31.9%	27.8%	41.3%	34.0%	40.2%
Hillary Clinton	37.0	29.0	40.3	32.0	41.1
John McCain	23.7	23.5	16.9	37.4	42.3
Mike Huckabee	12.4	14.4	6.4	2.0	19.2