Read more at NewsBusters | Explaining the difference between how Republican and Democratic caucuses are conducted in Iowa, MSNBC's Rachel Maddow noted that while Republicans tally votes statewide on a one person/one vote system, Democratic caucuses are more complicated and involve physically moving caucus-goers around the caucus room.
"In herds," NBC's Brian Williams helpfully offered by way of analogy.
Yes, agreed the host of The Rachel Maddow Show, exactly, "in herds."