IOWA CITY — The Iowa City Council seemed poised for a shake-up leading into Tuesday’s election. But the results show the term shake-up might be an understatement.Members of the coalition of candidates identifying as the Core Four — incumbent Jim Throgmorton and newcomers Rockne Cole, Pauline Taylor and John Thomas — swept the board in the Iowa City Council race, beating out challengers and unseating two incumbents.Current District C council member Throgmorton and Cole took the two at-large seats, ousting incumbent Michelle Payne and beating challenger Tim Conroy.In District A, Pauline Taylor unseated incumbent Rick Dobyns, and John Thomas won the District C election, edging out Scott McDonough.A total of 6,860 votes were cast in Iowa City, making for 15.18 percent of registered voters.