Conducted under the joint direction of Beacon Research (D) and Shaw & Company Research (R), the Fox News Poll includes interviews with a nationally representative sample of approximately 1,000 registered voters who were randomly selected from a national voter file and spoke with live interviewers on both landlines and cellphones. The total sample has a margin of sampling error of plus or minus three percentage points. When necessary, minor weights are used to ensure the demographics of survey respondents are representative of the national registered voter population. Generally, weights are only applied to age, race, education, and area variables. The Fox News Poll is not weighted by party identification. Before 2011, Fox News polls were conducted by Opinion Dynamics Corp.