Dr. Eric Ostermeier analyzed the history of plurality wins by a Presidential candidate over at Smart Politics. He has a whole host of remarkable numbers, but I’ll highlight a couple of Wisconsin-specific items.
With Trump’s (pending recount) plurality win, one of 14 this cycle, Wisconsin now has the highest percentage of plurality Presidential wins in the nation at 30.2%. That includes 4 straight plurality wins between 1992 and 2004, just one cycle off the record of 5 set by Indiana between 1876 and 1892.
That also makes Wisconsin one of only 3 states to have produced 5 plurality winners between 1992 and 2016, with New Mexico and Florida the other 2. New Mexico also produced plurality winners in the same years as Wisconsin, while Florida produced a plurality winner in 2012 instead of 2004.
That alone doesn’t make Wisconsin the swingingest swing state. It is also the margins of victory that matter, and since 2000, Wisconsin stands alone in that regard. Unless Trump gains a net of some 6,000 votes in the recount (or Clinton somehow gains a net of 29,000 votes or Stein some 1.4 million, neither of which appears likely to happen even after the most-Democrat-leaning county in the state, Menominee County, finished their portion of the recount), this will be the 3rd election of the last 5 to be decided by less than a percentage point.