For those hoping for more Iowa updates --
It sounds like there's a matter of contention over how the satellite caucuses had their SDEs distributed. The Iowa Democratic Party did it one way, the DNC apparently believes it should have been done another way. For those curious, the DNC's way, according to Nate Cohn, would take about 4 SDEs away from Sanders and would very likely prevent him from overcoming Buttigieg's lead with the remaining satellite caucuses left to count.
This is a major controversy waiting to burst.