Earlier in the day, Twitter added links to two of Trump's tweets prompting users to "get the facts" about mail-in ballots.
US deaths from the virus neared the devastating milestone of 100,000 over the holiday weekend and US hospitalizations are ticking up again.
After Facebook researchers found the site contributed to divisive rhetoric, executives reportedly nixed proposed changes for fear of appearing biased.
Burr stepped down as chairman of the Senate Intelligence Committee last week after it surfaced that the FBI had seized a cell phone belonging to him.
An anti-lockdown protester, whose partner founded a "peaceful" protest group, said armed violence is not off the table.