At a glance: Democratic presidential primary results and state delegate counts

Former Vice President Joe Biden extended his lead in the delegate race for the Democratic presidential nomination on Tuesday, sweeping the day's contests with wins in Arizona, Florida and Illinois as the country grappled with the coronavirus.A string of earlier victories had put Biden ahead of U.S. Senator Bernie Sanders in the race to amass the minimum 1,991 delegates needed to secure the nomination and challenge Republican President Donald Trump in the Nov. 3 election.Biden wins and will secur