It's safe to say this hug had zero effect on down-ballot voters.https://twitter.com/HeerJeet/status/1336890946684821505 …
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So your position is that activists who are literally fighting for their lives should stop doing so because the people killing them will use their protests as propaganda. 
I bet more people care more about how their local police are funded one way or another than who a senator hugs.
The conservative movement was much better at propagating that slogan and attaching it to Democratic politicians across the country. Nobody outside of California thought about Dianne Feinstein when voting.
If it is, it's probably correct. Most people don't know who she is or who he is or care about the hearings. Slogans that tend to confirm and amplify pre-existing bias are a different matter.
Feinstein made the decision to NOT fight the Barret nomination very hard, to NOT make a huge stink about how immoral the whole thing was, etc. It had the effect of largely taking the issue off of the table despite the fact that Dems had the popular position...
... probably no one said "I'm going to vote for GOP senator b/c of what Feinstein did" but very possibly a bunch of people WOULD have seriously thought about voting against GOP senator if this was a major issue highlighted in election cycle...
If she’d played the hearings better, that would’ve had a real impact. Democrats’ overall messaging was poor too, but I’d guess this one hug didn’t change anyone’s vote.
For the record, my position is that to a close approximation, zero voters voted Republican because Dianne Feinstein hugged Lindsey Graham, and that some downballot voters voted Republican because they believed Democrats wanted to slash spending for the police.
Did any Republican candidates run on Dianne Feinstein being soft on Amy Coney Barrett? No. Did lots of Republican candidates run on Democrats being in favor of defunding the police? Yes.
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