Media Exposure Over Time

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	Jan. 6-11	Jan. 14-20	Jan. 21-27	Jan. 28-Feb. 3	Feb. 4-10	Feb. 11-17	Feb. 18-24	Feb. 25 – Mar. 2	Mar. 3 – 9	Mar. 9-16	Mar. 17-23	Mar. 24-30	Mar. 31-Apr. 6	Apr. 6-13	Apr. 14-20	Apr. 21-27	Apr. 28-May 4	May 5-11	May 12-18
Barack Obama	31.9%	27.8%	41.3%	34.0%	40.2%	55.5%	56.8 %	69.0%	57.6 %	67.1%	71.6%	53.5%	55.7%	46.2%	75.6%	70.1%	69.4%	66.9%	67.5%
Hillary Clinton	37.0	29.0	40.3	32.0	41.1	56.9	49.9	58.2	59.9	50.8	30.3	63.3	55.4	55.8	59.1	63.9	40.7	70.0	53.1
John McCain	23.7	23.5	16.9	37.4	42.3	34.3	38.4	28.5	25.6	15.3	16.8	23.6	30.0	34.7	24.1	17.1	14.2	11.7	27.3