US president previously called coronavirus threat a 'hoax' conjured up by his political opponents and news media
Former vice president trounces Sen. Bernie Sanders in 3 state primary elections, amassing a large lead in pledged delegates to the Democratic national nominating convention
Former vice president trounces rival Bernie Sanders in Florida, Illinois and Arizona
Four states are holding Tuesday primary elections, with Biden favored to collect more national convention delegates
Top Democratic presidential contenders debate without an audience because of coronavirus threat
Decision blocks flights from 26 countries to US for 30 days starting at Friday midnight - Britain and Ireland are excepted
The Vermont senator acknowledges he is losing voters to the former vice president over who has the best chance to defeat Trump in November
Former vice president won in US auto manufacturing hub of Michigan, along with Missouri in the Midwest, Mississippi in the South and Idaho in the West
Outcome in three other states yet to be determined
WHO: Coronavirus pandemic threat 'very real'
Booker ended his own presidential bid in January, pledging to do 'everything in my power to elect the eventual Democratic nominee for president'
Steep decline at New York Stock Exchange triggered temporary automatic 15-minute halt in trading to limit losses to 7%
Vanquished Democratic opponents are supporting the former vice president's campaign against Trump
WHO's Tedros praises Italy for its lockdown of a quarter of the country's population
Former VP Biden, Vermont Sen. Sanders are the party's two main candidates left to chase the party's nomination to face Trump
Biden, Sanders are the focus after Super Tuesday voting left them to challenge each other for the right to run against Trump in the November national election
Former vice president wins 9 states in Super Tuesday voting, Vermont senator captures delegate-rich California
Former vice president won nine states, including delegate-rich Texas, surpassing popular Vermont Senator Bernie Sanders
A third of the national Democratic convention delegates are at stake across 14 states, with California the biggest prize
A third of the national convention delegates are at stake on Super Tuesday, with California the biggest prize
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