Latest Poll Shows Martha McSally Narrowly Leads in US Senate Race

Democratic Surge in Early Ballots has Tightened the Race

PHOENIX (Nov. 5, 2018) – The latest poll from OH Predictive Insights and ABC15 Arizona (ABC15/OHPI) shows that Martha McSally, Arizona’s Republican nominee for U.S. Senate, has a one-point lead over Democrat Kyrsten Sinema, with 49 percent of the vote. Green candidate Angela Green receives zero percent of the vote, down from one percent since our last poll. Since dropping out, Green no longer has the Election Day Independent voters, who we saw her take more of in a previous OHPI poll(8%).


The survey was conducted November 2 to November 3, 2018 with a sample of 631 respondents qualified as likely voters. All live-callers were used to collect the sample, yielding a +/-3.9% MOE.

“Arizona is seeing a historic midterm election turnout and Democratic voters are defying past historic early voting trends,” said Mike Noble, Chief Pollster and Managing Partner of Phoenix-based research company OH Predictive Insights. “The race has tightened and it’s fitting that the winner will be decided based on who can best turn out out their voters on Election Day.”

Since our last poll, conducted on October 22, the largest change has been the late return of a surge of Democratic ballots in Pima County. This is done by a bloc of Democratic voters who we were unsure would turn out in the general election: Steve Farley Democrats. This group is considered new primary voters who voted for Farley and not David Garcia in the Arizona primary election: OHPI analyzed them in September.

Farley Democrats started returning their ballots en masse within the last two days of early voting, especially standing out in Pima County with a ten-point Democratic advantage of 43 percent. In Maricopa County, the largest county in the state with 60 percent of the electorate, Republicans also have a ten-point lead with 43 percent. This indicates a lagging Hispanic turnout with engaged white Democrats, which is a trend OHPI was looking for and did not see materialize until recently.

The key comes down to Sinema’s voters being more energized, while Republicans need to turn out their voters on Election Day. OHPI found that 88 percent of Sinema’s voters have already turned in their ballots, while only 70 percent of McSally’s voters have done the same. This is ultimately a breakdown by region, where 86 percent of Pima County’s voters have already voted. Only 74 percent of those in the rural areas have done so, with more being Democrats.

A Republican turnout operation will be crucial to combat Democratic excitement. While many more of the votes for Sinema are already cast and guaranteed, McSally needs to pin her votes down and solidify them.

Methodology: This all live-caller survey was conducted via 50% cell and 50% landline poll. The poll was completed by OH Predictive Insights on November 2, 2018 and November 3, 2018, from a likely 2018 General Election voter sample. The sample demographics accurately reflected party affiliation, gender, region, and age. The sample size was 631 completed surveys, with a MoE of ± 3.9%. Numbers may not total 100%, due to rounding. Poll report for the General Election poll can be viewed here.


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