What are you talking about? No niche was insignificantly small given the margins by which Trump won Michigan, Pennsylvania, and Wisconsin. I showed that a few hours ago.
thanks for your analysis, but I prefer the opinion of a scientist who's not so obviously red-assed about Bernie
https://www.vox.com/policy-and-politics/2017/8/24/16194086/bernie-trump-voters-study
The Bernie voters who defected to Trump, explained by a political scientist
"In an interview, Schaffner noted that in an election this close, any number of voting blocs could have proved decisive. And the analysis certainly doesn’t necessarily prove Sanders would have won — Schaffner also found that 34 percent of John Kasich’s GOP primary supporters backed Clinton in the general; perhaps more would have stayed in the Republican camp had Sanders been the Democrats’ nominee, or perhaps fewer of Hillary Clinton’s voters would have voted for Sanders. Then again, it also suggests some voters were in Sanders’s reach that were out of Clinton’s.
Moreover, defections from a primary to general election are common. More voters went from Hillary Clinton to John McCain in 2008 than went from Sanders to Trump in 2016; about 13 percent of Trump’s 2016 voters also voted for Barack Obama in 2012.
...“The way to think about this is, as several people have noted, that this election was so close that any number of things could have proved the decisive difference,” Schaffner said in an interview. “This is yet another one of those anythings.”
..One piece of this that’s important to keep in context is that you always see this kind of defection between a primary and a general election. In 2008, you saw a lot of Hillary Clinton voters who ended up backing John McCain — so it's not abnormal to see this kind of thing. And more of them did so in 2008 than this time. [15 percent of Clinton’s 2008 voters in the primary supported McCain in that year’s general election.] Although given the candidates this time versus in 2008, it may have been surprising to see even this rate of defection."
Primary voter defection is a constant variable. It will literally be a factor in every election. The implication that Bernie Sanders primary supporters should somehow be immune or exempt to that rule is ridiculous.