In a letter Friday, political analyst Charles Krauthammer announced that his cancer has returned and he only has weeks to live. According to The Hollywood Reporter, Krauthammer - a Fox News contributor and Washington Post columnist, explained that the cancer returned following surgery in August last year to remove a tumor in his abdomen. In his letter, Krauthammer says, "There was no sign of it as recently as a month ago, which means it is aggressive and spreading rapidly.