Can you spot the trend?

The 10 most recent Gallup poll results:

Time period: Obama Romney

Oct. 5-11: 47, 49
Oct. 6-12: 47, 49
Oct. 7-13: 47, 49
Oct. 8-14: 47, 49
Oct. 9-15: 46, 50
Oct. 10-16: 45, 51
Oct. 11-17: 45, 52
Oct. 12-18: 45, 51
Oct. 13-19: 45, 51
Oct. 14-20: 45, 52

Note that presidential debates occurred on Oct. 3 and 16 and the vice presidential debate occurred on Oct. 11.

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