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Source: Public Policy Institute of CA (url)

CandidatePolitical PartyPollGraphPoll Details
DClintonDemocratic54%piePoll Date: 2016-10-23
RTrumpRepublican28%Number Polled: 1,024
IMcMullinIndependent0%Margin of Error: 4%
-Other-12%Voter Type: Likely
-Undecided-4%

Clinton with More than 20 Point Lead in California

 By: leip (C-NY) on 2016-10-27 @ 12:32:20

Question:
If the November 8 presidential election were being held today, would you vote for: the Democratic ticket of Hillary Clinton and Tim Kaine, the Republican ticket of Donald Trump and Mike Pence, the Libertarian ticket of Gary Johnson and Bill Weld, or the Green Party ticket of Jill Stein and Ajamu Baraka?
Clinton 54%
Trump 28%
Johnson 5%
Stein 5%
Someone Else 2%
Would Not Vote for President 1%
Don't Know 4%

About this Poll
Findings in this report are based on a survey of 1,704 California adult residents, including 852 interviewed on landline telephones and 852 interviewed on cell phones. Interviews took an average of 18 minutes to complete. Interviewing took place on weekend days and weekday nights from October 14–23, 2016.

Landline interviews were conducted using a computer-generated random sample of telephone numbers that ensured that both listed and unlisted numbers were called. All landline telephone exchanges in California were eligible for selection, and the sample telephone numbers were called as many as six times to increase the likelihood of reaching eligible households. Once a household was reached, an adult respondent (age 18 or older) was randomly chosen for interviewing using the “last birthday method” to avoid biases in age and gender.

ell phone interviews were conducted using a computer-generated random sample of cell phone numbers. All cell phone numbers with California area codes were eligible for selection, and the sample telephone numbers were called as many as eight times to increase the likelihood of reaching an eligible respondent. Once a cell phone user was reached, it was verified that this person was age 18 or older, a resident of California, and in a safe place to continue the survey (e.g., not driving).

The sampling error, taking design effects from weighting into consideration, is ±3.4 percent at the 95 percent confidence level for the total unweighted sample of 1,704 adults. This means that 95 times out of 100, the results will be within 3.4 percentage points of what they would be if all adults in California were interviewed. The sampling error for unweighted subgroups is larger: for the 1,358 registered voters, the sampling error is ±3.7 percent; for the 1,024 likely voters, it is ±4.3 percent. Sampling error is only one type of error to which surveys are subject. Results may also be affected by factors such as question wording, question order, and survey timing.

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