SOURCE: Preliminary exit poll results from 2,376 interviews of randomly selected voters as they exited voting places across the commonwealth of Virginia on Tuesday, Nov. 5. The poll was conducted by Edison Media Research for the National Election Pool, the Washington Post and other media organizations. Typical characteristics have a margin of sampling error of plus or minus four percentage points; the error margin for smaller voting groups is larger. POLLING: Peyton M. Craighill and Scott Clement | GRAPHIC: Kennedy Elliott - The Washington Post. Published Nov. 6, 2012.