WASHINGTON - In his daily briefings on the coronavirus, President Donald Trump has brandished all the familiar tools in his rhetorical arsenal: belittling Democratic governors, demonizing the media, trading in innuendo and bulldozing over the guidance of experts. It’s the kind of performance the president relishes but one that has his advisers and Republican allies worried. As unemployment soars and the death toll skyrockets, and new polls show support for the president’s handling of the crisis sagging, White House allies and Republican lawmakers increasingly believe the briefings are hurting the president more than helping him. Many view the sessions as...