Race, COVID emerge as prominent themesEarlier in the night, family members of George Floyd — whose killing by Minneapolis police in May set off nationwide protests for racial justice and against police violence — introduced a moment of silence."My brother George was selfless and always made sacrifices for his family, his friends, and even complete strangers," Philonise Floyd said, before adding that the protests are "a fitting legacy for our brother, for George should be alive today."Congressman Jim Clyburn (D-South Carolina), whose support for Biden in the South Carolina primary earlier this year was crucial for resuscitating his less-than-stellar showings in Iowa and New Hampshire, encouraged people to support Biden, saying he meets the.