Digging into the data on this poll is pretty interesting, below is basically the relevant points and also I've compared the poll results over time.
Trump approval is 48-50 and the generic congressional vote is 44R-44D. The sample is R+5, 39R-34D, for way of comparison the 2016 exit polls had the electorate at R+4 in AZ.
The last poll done by this pollster in 2018 had McSally +1 and she lost by 2.4% so they were 3.4% biased in favour of the Republican candidate so I would say they may have a slight 2-3 point bias in favour of Republicans looking at the 2018 results.
I’ll focus mostly on Trump vs Biden since the numbers have bounced around a lot for the other candidates this year, maybe related to name ID issues.
In February Trump and Biden were tied at 46-46, in May Trump trailed Biden 44-49, in August Trump trailed 43-45 and now in December Trump leads 46-44.
https://www.dropbox.com/s/6rhlttfgxw5gk95/Presidental%20Report.pdfhttps://twitter.com/OHPredictive/status/1203849269645598720Taken at face value the latest poll would suggest a Biden lead of around 3.6% in the NPV assuming the swing in Arizona is similar to the nation, if you adjust the poll to account for a potential R bias, you might have Biden leading by around 6%. Certainly a far cry from the margins Biden is getting in the national polls vs Trump.
