Some supporters backing non-viable candidates at a Des Moines caucus have decided to band together to support Cory Booker — who dropped out of the race last month.
The move means they declined to support viable candidates like Pete Buttigieg, Elizabeth Warren and Bernie Sanders.
About viability and realignment: At the start of the caucuses, voters split up into groups dedicated to their first presidential candidate of choice. Typically, a candidate needs 15% of the vote to remain viable, as determined by the amount of people participating in the precinct location, but smaller locations may have different viability thresholds.
If a candidate is not viable after that first round, their voters can realign to another viable candidate — or join together to create a group in support of another candidate that meets the threshold.