The USA Today/Gallup poll was conducted Sept. 15-18. The poll surveyed 1,004 adults, 889 of whom registered voters. The margin of error is +/- 3.3 percent. There were 439 Republicans and Republican-leaning independents; this sample includes non-voters. For the Republican sample, the margin of error is +/- 4.7 percent.
Perry Maintains Lead Over Romney, But Romney Slightly Stronger Against Obama
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