I'm not an academic and don't have the in depth knowledge of political ideologies that some here seem to have, and I don't get hung up on labels.
I do come from a long line of rural working class political activists and members of the Democratic Party. In the context of the very socially and politically conservative community where I grew up (Majority Republican, very high church attendance, 98% white, Median household income $38k while US average $51k), my family were considered very left wing. I was and remain off the scale to people there.
84% voted Trump. They have backed the Republican candidate in each election since 1964 when Johnson got a slim majority. In communities like this throughout the US, most white working class folk have been happily Republican for generations. They aren't going to change. I don't think people in the UK nor the mostly urban, often better educated supporters of Sanders in the US understand that.