Nischke benefits from the largely Republican makeup of the city. In the last Presidential election, Republican straight-ticket voters in the City of Waukesha made up 64% of the straight-ticket ballots cast. Republican US Senate candidate Tim Michels won the City of Waukesha in 2004 54% to 45%.
State Representative Ann Nischke also has the advantage of geography. Her district covers most of the City of Waukesha. Alderman Nelson represents one aldermanic district.
Arguably, Nelson has run the better campaign, and has even demonstrated a willingness to go negative in the closing days of the campaign with his direct mail and telephone calls.
But the race has become so partisan and the two candidates have become so identified with their parties that it would be still be a major upset if Nelson wins. I predict Nischke wins with close to 55% of the vote.

City of Brookfield: Incumbent Mayor Jeff Speaker should defeat Alderwoman Cindy Kilkenny in this pretty bitter race. When the subject of the campaign becomes mental fitness for office, regardless of how unfair the charge might be, it's pretty tough to win.