Biden Scores Surprise Upset over Sanders in Super Tuesday Primaries, Taking Ten of Fourteen States; Former Vice President Now Ahead in Delegate Count by About 65 Votes; Bernie’s Entire Strategy Disrupted; Bloomberg Bows Out, Pledging His Organization and Resources to Defeat Trump; Virginia Voter Turnout Nearly Doubles, but to Biden’s Benefit, Refuting Sanders’ Theory That Bigger Turnout Means More Votes for Him; California Results Look Better for Bernie Because So Many Dropout Candidates Remained on Ballot; Democrats Must Respect Preference of Black Community, Who Remain Unconvinced by Sanders