Probably not. His two (2) elections were a bit flukish. He'd have lost in 2016 had Trump not carried the state, and had he been running against a fresh candidate and not a retread like Feingold.
I agree with this (except for calling Feingold a retread - there weren't any more credible options than him). Johnson isn't a juggernaut. He won in what were effectively two wave years for midwestern Republicans. His win in 2016 had more to do with Feingold having the Clinton albatross around his neck than it did Feingold himself.
Dude performed 3 points worse than Clinton, that's not getting dragged down by Clinton, if anything he pulled Clinton down! And 2016 was not a Republican wave
Feingold's loss being attributed to Clinton has always been an odd meme considering he did significantly worse than her. I suppose Ted Strickland would've won if not for Satan Incarnate too!