Kristi Noem didn’t appear to know she’d been fired Thursday afternoon as she spoke before an audience of law enforcement officials. As Donald Trump announced Noem’s sudden ouster on social media, the Homeland Security secretary was in the midst of delivering the keynote address at the Major Cities Conference in Nashville, Tennessee. Law enforcement officials asked questions and offered praise to Noem—but not one asked about her dramatic title change. At one point, Noem teased Trump’s plan to unv...