Supreme court. trump also wants to wrap up the nomination as soon as possible, in order to avoid a prolonged primary battle, so he can shift's attention to the general election and to his myriad legal troubles. the results in iowa will set up the race to come and reveal who trump's main challenger is going to be. at the moment, that does appear to be the former south carolina governor, nikki haley. she is still a very distant second place in iowa, but she's showing strength in new hampshire, which will hold its primaries just eight days after iowa. a poll conducted by cnn at the university of ...