Biden closes in on Democratic presidential nomination
Eight states and Washington D.C. held primaries Tuesday in what was the biggest day of voting since Super Tuesday in March. After a slew of wins, Joe Biden is now closing in on the number of delegates he needs to formally clinch the Democratic nomination. CBSN political reporter Caitlin Huey-Burns joins CBSN's Elaine Quijano on "Red & Blue" with a look at the results.