The Fox News Poll is conducted under the joint direction of Anderson Robbins Research (D) and Shaw & Company Research (R). The telephone poll (landline and cellphone) was conducted April 18-21, 2016, with live interviewers among a random sample of 1,205 Indiana voters selected from a statewide voter file (plus or minus 2.5 percentage points).  Results for the 602 likely Republican primary voters have a margin of sampling error of plus or minus four percentage points.