In the US, the field is narrowing as Republican presidential hopefuls look to the South Carolina primary this weekend. <br /><br />Rick Perry has withdrawn from the race, giving his support to former speaker Newt Gingrich instead, but Gingrich has other problems.<br /><br />He is dealing with fallout from a public interview by his ex-wife, who says he asked her for an open marriage.<br /><br />At South Carolina's final Republican debate, Gingrich hit out at the US media.<br /><br />Al Jazeera's Alan Fisher reports from South Carolina.
