This project will continue through to the election.
Gallup Survey Methods
Results for the Gallup poll are based on telephone interviews conducted beginning on July 11, 2016, on the Gallup U.S. Daily survey, with a random sample of 500 adults, aged 18 and older, living in all 50 U.S. states and the District of Columbia. For results based on each weekly samples of approximately 3,500 national adults, the margin of sampling error is ±2 percentage points at the 95% confidence level. All reported margins of sampling error include computed design effects for weighting.
Each sample of national adults includes a minimum quota of 60% cellphone respondents and 40% landline respondents, with additional minimum quotas by time zone within region. Landline and cellular telephone numbers are selected using random-digit-dial methods.
Learn more about how the Gallup U.S. Daily works.