In a concentrated predawn burst, the president posted or reposted 89 messages between 5:49 a.m. and 8:04 a.m. on Sunday on top of 18 the night before, many of them inflammatory comments or assertions about violent clashes in Portland, Ore., where a man wearing the hat of a far-right, pro-Trump group was shot and killed Saturday after a large group of Mr. Trump’s supporters traveled through the streets. He resumed on Sunday night.
In the blast of social media messages, Mr. Trump also embraced a call to imprison Gov. Andrew M. Cuomo of New York, threatened to send federal forces against demonstrators outside the White House, attacked CNN and NPR, embraced a supporter charged with murder, mocked his challenger, former Vice President Joseph R. Biden Jr., and repeatedly assailed the mayor of Portland, even posting the mayor’s office telephone number so that supporters could call demanding his resignation.