In a business class that I just finished, a professor showed us a video on body language and the difference from Hilary pre-politician and Hilary during her run and after her run showed us that she toned her voice down and her voice & demeanor went from soft spoken to gruff and demanding because of how well voters respond to powerful looking women, one of those qualities being a deeper voice.
That's really interesting! I thought it would be the opposite, as women in power are more likely to be seen as abrasive (as opposed to men, who tend to be seen as "assertive," instead). I've heard Hillary receive flack before for being too harsh and "bitchy."