I will be digging into this some more as time permits. Although I can’t find a link to the exit poll methodology or how weighting was done, I’m assuming CNN drew its sample of 1907 Republicans not only from Election Day voters, but sampled early in-person and called absentee voters who cast ballots ahead of the March 15, 2016 PPP in Florida.
But some quick observations of the marginals…
First, and most glaringly, I am hard-pressed to believe that only 39% of Republican respondents were 60+. Sure, Election Day voters tend to be younger than convenience voters (early in-person and absentee mail), but my analysis of the statewide voter file and absentee and early in-person voting indicates that of the nearly 1.2m Republicans who voted prior to Election Day, 63.4% were 60+.
So, some simple arithmetic: A total of nearly 2.36m votes were cast by Republicans in the PPP; less than half of the total (roughly 1.16m) were cast on Election Day. If CNN’s exit poll is accurate, that 39% of Republican voters were 60+, it would mean that 919.9k of the 2.36m Republican voters were in this group of older voters. But roughly 756.9k Republicans 60+ had already voted early (in-person and absentee), which leaves only 163k Republicans over 60 to show up on Election Day. That would mean that only 1 in 8 of the 1.64m Republican voters who showed up on Election Day were 60+.
That’s just not credible.
This is not the first time I’ve found problems with CNN’s exit polls; its 2014 General Election exit polling breakdown for the age of voters was also way off.
But we’ll know for sure about the accuracy of CNN’s 2016 PPP exit polls in Florida next month.