Civil Beat surveyed a random sample of 819 registered Hawaii voters on Oct. 9-10, using interactive voice response technology (touch-tone polling). Calls were made to landline and cell phones. Cell phones were contacted in compliance with federal law.

Results were balanced for age, gender, ethnicity, and phone type.

The sampling margin of error for the full sample is 3.4 percentage points. The margin of error indicates that in 95 percent of samples of this size, the results will be within plus or minus 3.4 percent of the actual percentage in the full population of registered voters. Other sources of error, such as imperfect response rates, are also common in public opinion research and may affect the results. The margin of error for any crosstabulated result is larger than the margin of error of the corresponding topline result.

For the poll on the U.S. Senate race, Civil Beat surveyed 549 registered Hawaii voters who said they will vote Democrat in the primary. The poll has a 4.2 percent margin of error. For the poll on rail, we surveyed 540 Oahu voters; the margin of error is plus or minus 4.2 percent.

The poll was conducted by Civil Beat working with Merriman River Group, a full-service consulting organization specializing in opinion research, election management, and communications.

The full poll questionnaire and results are posted below.