President Trump refuses to concede blocking officials from cooperating with President-elect Joe Biden’s team and Attorney General Barr authorizing the DOJ to probe unsubstantiated allegations of voter fraud; Pfizer says its experimental Covid-19 vaccine was found to be more than 90% effective, as the nation reaches five days in a row of 100,000 cases a day or more; the Supreme Court hears arguments on the legality of the Affordable Care Act, now appears the two conservative justices are unwilling to strike down the entire law.