Hillary Clinton, the presumed Democratic nominee for the 2016 election, appears to be growing weary of answering, or not answering fully, questions about her use of a private email server during her tenure as secretary of state. During a news conference on Tuesday in Las Vegas, journalist Ed Henry repeatedly asked Clinton about the server and her email. When asked if she had wiped her server clean, Clinton responded by waving her hand in a wiping motion and saying, "What, like with a cloth or something?" It wasn't just the language and the gesture; it was the smirking expression that...