Honestly, I hadn't heard of him. I live in the first district and I'm focusing on the Governor race right now. But he seems perfect. He represents Lewiston, which has a lot in common with Rust Belt towns...very Democratic in the 60s (often, Androscoggin County was the only county to go Democratic when the rest of the state went for Republicans) through the 90s, but has swung hard right since then.
Honestly, Rich and Fulford have a chance, but if Golden gets in he's probably the strongest challenger to Poliquin. It'd become pure tossup.
Doesnt Lewiston have a high Somalian refugee population for some reason? And If i remember correctly, Androscoggin was the closest Trump county in the state last year. (I think Clinton won Waldo by like 20 votes or something). Id give Poliquin the advantage to start off though. District is trending republican and he's got the French name in a very French area