“The 8th Congressional District has historically been more competitive than the 6th, but it still usually produces a Republican Congress member. The redistricting reduced the size of the 8th, but did not change its partisan makeup very much. Because northeast Wisconsin is growing more rapidly than the northwest, the 8th lost several counties to the 7th that border with Michigan (in the 2011 redistricting).
“While the partisanship of the 8th didn’t change much, the moderate Republican Reid Ribble elected in 2010 was replaced by the more conservative Mike Gallager in 2016, (the year) that elected Trump.”
– James Simmons, professor of political science at UW-Oshkosh