That's interesting. Lots of theories and psych-speak bandied about explaining why, but ultimately the bottom line seems to be that conservative Republicans like it when their women politicians looks like women.
Preferably reasonably hot women.
No, this will not in any circumstances make me even consider for a miniscule moment switching parties.
""The Democratic Party is associated with social liberal policies that
aim to diminish gender disparities, whereas the Republican Party is
associated with socially conservative policy issues that tend to bolster
traditional sex roles," Johnson said. "These policy platforms are
manifest in each party's image — apparently also in the physical
characteristics exhibited by politicians."
We could also call this "the Reese Witherspoon chin" effect. Compare and decide for yourself.