Democrats will hold an almost entirely virtual presidential nominating convention Aug. 17-20 in Milwaukee using live broadcasts and online streaming, party officials said Wednesday. Party Chairman Tom Perez said scaling back Democrats’ festivities is a matter of public health. He sought to draw a contrast with Trump’s push for a traditional convention in North Carolina, clashing with the state’s Democratic governor, Roy Cooper, and public health officials over the details amid the pandemic. The Republican National Committee has confirmed its official business will be conducted in Charlotte. But Trump has said he plans to accept his nomination in Jacksonville, Florida,...