Actually I mentioned Whittier and Como memphis. My text is a big more subtle than the strawman you created, and then beat up, and incinerated the ensuing mayhem of straw.
... seems to be that Dems can't win without at least some working class white people. Ignoring the implication that Dems do better among the well off, which is factually incorrect, that doesn't strike you as blindingly obvious? I think you need to meet more working class people. Don't you have a farm in Iowa? How did that state vote, again?
Working-poor white people seem to have little involvement in formal organizations. Being stretched to their financial limits, they are unable to afford memberships in anything. Often working split shifts or on an on-call basis they are often unable to participate in anything. They often live in a cultural and intellectual vacuum and they often kiss up to their employers for even a slight advantage in getting a chance at a few more hours of work. Kissing up means in part adopting the political views of the employer.
White working people used to be heavily unionized, so they got some view other than "this company is the closest thing to a friend that I can have". (Some friend!) Maybe they even believe that if the minimum wage is cut, they might get more hours on the job. 40 hours a week at $6 is better than 28 at $8 -- right? (The difference is $16, which means that an employer would get 12 more hours of work at an average of $1.33 for each additional hour worked.)