It may be the key demographic for Trump.
Romney won white women by 14 %. Trump will have to come close to or beat that number to win.
Here are the 2012 exit poll results. The problem for Romney was Obama murdered him so badly among African-Americans, Hispanics, and even Asians. Republicans can lose groups, but they can’t lose them by 96-3 (A-A women) or 76-23 (Hispanic women).
http://www.huffingtonpost.com/david-c-wilson/the-elephant-in-the-exit_b_2094354.html
Romney and Mccain didn’t get out their base. That was the tragedy.