Here's the link that was in the article that goes to the actual poll, that was used in the OP.
http://cdn.cnn.com/cnn/2018/images/10/08/rel9a.-.kavanaugh.pdf
I did a word search for the word "Independents" and found the word, just twice. Here's where I found the word.
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"The study was conducted for CNN via telephone by SSRS, an
independent research company"
and
"A total of 1,009adults were interviewed by telephone nationwide by live interviewers calling both landline and cell phones. Interviews were conducted in English and Spanish. Among the entire sample, 31% described themselves as Democrats, 25% described themselves as Republicans, and 44% described themselves as
independents or members of another party."
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So therefore, one has to assume, the OP is based on FAKE NEWS.