Sociologists blow up the myth that less educated white voters voted for tRump because of economic anxiety.
[rawstory.com]
I think perhaps they saw Trump as the only alternative to continued attacks on the Second Amendment, and to the perceived economic threat of illegal immigration. If a Democratic candidate wants to win in 2020, they should stop attacking the Second Amendment, and support stricter immigration reforms.
Based on your comment I'm wondering if you read the article?