to trump dururg her iowa rally but bernie sanders did. >> donald trump is very upset, it's very hard for him to deal with. i don't know what his relationship with him has been in his life but he has discovered that women go to the bathroom. >> reporter: sanders making light of trump's attack on clinton after her bathroom break during the abc news democratic debate. it's not the first time trump's comments have insulted women. his public battling with fox news host megyn kelly and gop rival carly fiorina made headlines earlier this year. >> it's the mark of a man who i believe has no respect for women, whatsoever report female supporters are sticking with trump. >> i don't think he's insulting to women. i think there's a lot of women out there that are very insulting to other women and to men out there. poll has trump still at the top with 28% of gop voters. but quinnipiac university says six in ten women voters say they would be embarrassed to have trump as their commander...