Sen. Bernie Sanders did poorly on March 3rd, Super Tuesday. Former VP Joe Biden crushed him in several voting contests on March 10. Business Insider reports that Biden has a huge lead in delegates. Biden has 860 delegates, Sanders has 710. Candidates need 1,991 pledged delegates to win the 2020 nomination. March 17 could really be a make-or-break day for Sanders. On March 17, 577 delegates will be at up for grabs in Arizona, Florida, Illinois, and Ohio.