Kshama Sawant, the Seattle city councilmember who was elected four years ago, appears to have been re-elected. See this story. The race is non-partisan, but she is a member of Socialist Alternative.
UPDATE: as of November 4, the vote is: Sawant 8,197; Pamela Banks 7,349.
As far as I know the numbers are updated here:
https://electionsdata.kingcounty.gov/2015/election-results-nov/three/City%2C%20P-Z/Seattle/City%20of%20Seattle%20Council%20District%20No.%203