Finegold lost to Johnson by 4 points. So Johnson won his senate seat by 4 points where as Trump only won the state with even less votes than Romney received in 2012 and won by only less than 1 percent of the vote.
Senate 2016
President 2016
Pretty Much this is how that Works Feingold did really well in the southwest in 2016 far better than clinton but in WOW he got crushed especially Waukesha County Trump got 59.99% there Johnson got 67% there! and its a really populated County so pretty much Feingold did a really good job in the rural regions but couldn't win over a lot of the Romney-Clinton voters in WOW so much so that he got crushed there causing him to lose more than Clinton.