There's some truth to this. IMO, a large number of middle to lower class White's don't find themselves in a position that they saw their parents in at their age. No savings, retirement plans, pensions. It's not a coincidence that drug, alcohol addiction and suicide is up in that group. They simply don't have what many feel were promised or owed by a economy that left them behind.
Then along comes Trump. His campaign is one big get rich seminar. You know why you aren't working for high wages? (Insert democrats, china, Mexicans). You know who can fix it? Only me. We are going to make America great again. I'm going to bring the big manufacturing jobs back that your father retired from. I'm going to deport the Mexicans that are stealing your jobs. And for people with nothing, they latch on.