The article leads with a chart, which says that 75.1% of Democrats believe that "Whites are favored". The chart repeats later in the article. Problems:
The chart has no source.
To get the chart, the author did math on the CNN exit poll data. He did not show his work.
I checked what math he did by asking him on Twitter, since he didn't document it. His math was wrong. Where he got 75.1%, the correct answer was 75%. He added an extra significant figure to exaggerate how good his data was. He admitted I was right, but thought the matter deserved the comment "lol" rather than saying e.g. "My mistake, I will fix it."
The chart was brought to my attention by khaaan on Twitter, who questioned its sourcing.