Biden and Trump win enough delegates to ensure they are their party's candidates in November's US presidential election. Results of Democratic and Republican primaries in the states of Georgia, Mississippi and Washington were virtually a foregone conclusion.
Donald Trump is the target of four criminal proceedings, including on March 25 in New York for a case of payments to a former pornographic film star, Stormy Daniels. Joe Biden, 81, has never faced serious opposition and Donald Trump's last competitor, Nikki Haley, threw in the towel on March 6.