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
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%
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
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