Kamala Harris drops out. This was a bit of a surprise for me. She didn't have a serious chance, but I thought she'd at least tough it out until the early states.

Speaking of surprises, Gabbard's got the numbers in the early states (from non-qualifying polls) that we might be seeing her again in the next debate. It's a bit of a toss-up still, though - she's within the margin of error, so she could also show as just below the line in few remaining qualifying polls. I didn't expect her to outlast Harris.