Only if Steins votes would have gone to Hillary.
If Stein was not running her supporters might not have even voted.
We will never know for sure.
True, but WI and MI were real close Trump victories, and Stein pulled 4-5 times the votes needed to make Hillary the winner in those states. Stein had close to 470K votes in 2012, and in 2016 almost a million votes more than that. I’m not sure there were enough Stein votes in PA that could have flipped to Hillary, but if they had gotten closer to Trump, the DEMs would have found a way to steal PA.