He isn't even working class:

Eventually they moved to York, Pennsylvania, where Fetterman grew up and his father became a partner at an insurance firm. He grew up in an affluent suburb of York, and his parents were conservative Republicans.

Fetterman has said he had a privileged upbringing. He said he "sleepwalked" as a young adult while playing four years of football in college, intending eventually to take over ownership of his father's business.