The old 15th. Compact. Mostly West Allis, as far as I can tell.
But a GOP state senator exuberantly offered some redistricting suggestions.
The new 15th. Stretches into conservative Waukesha County (west of the red line). As a result, the current rep at the time, Tony Staskunas (D-West Allis) saw the writing on the wall and retired after 16 years of service. The seat is now held by one of the Assembly's most reliably conservative reps, Joe Sanfelippo.
As a GOP side benefit.......
Court to Wisconsin Republicans: Redraw election districts. (Milwaukee Journal Sentinel, 1/27/2017)
About the judges: Kenneth] Ripple was appointed by Republican President Ronald Reagan, [Barbara] Crabb by Democratic President Jimmy Carter and [William] Griesbach — who dissented in the November decision — by Republican President George W. Bush
Wisconsin redistricting: Judges saw evidence, reached obvious conclusion, part 1. (1/28/2017)
Part 2. (1/28/2017)