Given the partisan split here, it'd be really interesting to see (in a dream world of endless questionnaire space) something along the lines of "And about what share of other people in the [Democratic/Republican] Party do you think support the death penalty?"
(The hypothesis here being that, if it's a social desirability thing rather some other mode difference -- or sampling -- pro-death penalty Dems might be more reticent to express that view if they think they're in the minority within their own party.)
Here's a first look at the preliminary research into the 2020 general election polling error.
So far, it's most definitive in ruling out potential causes -- e.g. education weighting, late vote shift -- that *don't* seem to have been major factors.
This is no surprise if you've been following discussions, but focus is coalescing around some form of differential non-response - that is, people who were polled are different from people who weren't, in a way current weighting didn't account for.
For instance, even if a poll included the correct number of Republicans compared to the actual electorate, Republicans in the poll might have been less supportive of Trump than Republicans who weren't reached.
I've information anecdotal, chemical, and clinical
I know the COVID experts, and I quote-tweet fights on aerosols
List BioNTech to Zeneca, in order categorical
I'm very well acquainted, too, with matters virological
I understand most models but I'm baffled by the cubical
About t-cell immunity I am teeming with a lot o' news...lot o' news...
with many cheerful facts about the antibodies I'll produce!
I know the vaccine history from Jenner and the old cowpox
I answer diagnostics, I thank all the nurses and the docs
I quote in elegiacs all the CDC analysis
And hope we'll usher in an annus slightly more mirabilis
I can tell adenoviruses from mRNA and spike proteins
Secondary question now is probably whether decreased confidence in J&J actually spills over into decreased vaccine willingness, or just results in more people having a preference for an alternative vaccine.