“Weakly affiliated Democrats had basal Testosterone levels 19% higher than strong Democrats and all Republicans.”
So it's not as simple as "more testosterone means more Republican".
It looks weird to me they don't report how age behaves across groups and don't correct for age in baseline comparisons.
So,... Republicans are reported as having basically the same T?
“Weakly affiliated Democrats had basal Testosterone levels 19% higher than strong Democrats and all Republicans.”
So it's not as simple as "more testosterone means more Republican".