Reeling from another crisis of his own making, President Donald Trump tried to refocus attention on his Democratic rival at a rally in battleground Michigan Thursday as he pushed to move past revelations that he purposefully played down the danger of the coronavirus last winter. But the virus controversy followed him as he faced new pushback from local officials worried about the growing size of his rallies and his campaign’s repeated flouting of public health guidelines intended to halt the COVID-19 spread. That includes Michigan’s Democratic Gov. Gretchen Whitmer, who raised alarms about Thursday’s event. Trump, however, reveled in the crowd of several thousand, packed shoulder-to-shoulder in a cavernous airport hangar, mostly without masks.