Democrat presidential frontrunner Hillary Clinton has more reason to fret despite a smashing victory in the South Carolina primary. Federal Judge Reggie B. Walton ruled that Clinton’s top aides should be questioned in the ongoing e-mail scandal. Fox News senior judicial analyst Judge Andrew Napolitano says the probability is now high that Clinton herself will be subpoenad to testify under oath. He analyzes the new developments with Fox News host Stuart Varney.