Republican presidential frontrunner Donald Trump defended federal funding to Planned Parenthood during Saturday night's presidential debate in South Carolina and also did not back away from his past support of impeaching former President George W. Bush. At times during the debate, the discussion led to very heated back-and-forth exchanges between candidates, most of which involved the billionaire real estate mogul who currently leads by wide margins in most South Carolina Republican nomination polls. After Trump used former President Ronald Reagan to defend himself as "flexible" for changing his mind on certain issues like abortion and his views on Democratic frontrunner...