Unconscious Bias?

 I had an interesting thing pointed out to me the other evening. 

We, collectively but not absolutely, seem to differentiate between men and women presidential candidates in a very important and potentially misogynistic manner. 

More often than not, we call the male candidates by their last name: Biden, Trump, Obama. 

On the other hand there appears to be a tendency to address women by their first names: Kamala or Hillary come to mind. 

Why don't we call men by their first name? How does Joe or Don sound? 

There are exceptions. I understand that the pool of women who are/were presidential nominees is small, two. And yes, the vice president candidate, Sara Paulin, was not called Sara. But even so, JD Vance is addressed by his last name.

I wonder if there is an unconscious bias at work? Or is it something more sinister and misogynistic?

Food for thought.

-- Bob Doan, Tequesta, FL

updated to clarify a confusing sentences, 3 Aug