Wauwatosa is the epitome of what the GOP is leaving behind by going into the party of Trump. Voted for Kasich in the primary, voted for Obama by 1 in 2012, Clinton by 22 in 2016. 56% have a bachelor's degree, household income around $69,000. Brookfield is also hilarious, Trump halved the margin Romney got there.
Seems kind of irrelevant in light of the gains. Kasich was third in Wauwatosa county (Cruz won) and trump still won it by 27 in November. Kasich voters are a small voting bloc compared to the new voters Trump brought into the GOP. Trump didn't do all that badly in the southeast corner (he flipped Racine and Kenosha counties between Milwaukee and Chicago) and he had double digit swings in most of the counties in the northern and western parts of the state (He beat Hillary by more than 20 in some counties that Obama won twice).
It's also worth noting that the white working class democrats who flipped over to Trump did so because the democratic party had abandoned them on the issues, whereas many of the suburban voters who refused to vote for Trump did so because of his personality. In other words, Trump's platform could have won a lot more votes with a better messenger. To be fair, Hillary was also a bad candidate. Bernie might have won Wisconsin and Michigan.
