The One Tree Hill star, a registered Democrat, was discussing Republican candidate Mitt Romney's lack of support for women's rights with her Twitter.com followers as she watched the televised event in Florida, but she quickly found herself under attack from Republican supporter Michelle Malkin for referring to her vagina as she talked about women's healthcare. Malkin called out Bush for her "silly" comments and, responding to another Twitter user about the actress, she posted, "(Bush) tweeted about her vagina & thinks she's a modern-day suffragist." Bush hit back and criticised Malkin for bullying and name-calling, and later tweeted: "I'm all...