Former first lady Michelle Obama, in a measured but searing address Monday to close out Democrats' opening convention night, accused President Trump's White House of operating in "chaos" and without "empathy" as she urged voters to cast their ballots for Joe Biden like their lives depend on it. In prerecorded remarks, Obama stressed the “awesome power of the presidency,” while saying the job “requires clear-headed judgment, a mastery of complex and competing issues, a moral compass and an ability to listen.” She added: “Whenever we look to this White House for some leadership or consultation or any semblance of steadiness,...