Update: The ‘Centrists’ seem to be uniting behind Joe Biden. Pete Buttigieg and Amy Klobuchar have both quit their campaigns and plan to endorse Biden. As the process enters super Tuesday, the choice for voters is between four candidates. Bernie Sander remains the only candidate on the left of the Party, Warren has settled on a middle ground between the left and the center of the Party. The centrists are Joe Biden and Mike Bloomberg. This remains the biggest uncertainty, How efficient has Bloomberg’s Ad campaign been?