...Impossible to identify the rationale of each voter...
Unfortunately for you(r side), it is impossible to identify the rationale of statistically significant
groups of candidate-flippers, either.
...But in an election decided in a few key states by less than one percent, there are multiple factors that could have swung 10,000 votes...
You(r side) needs to (1) identify a Candidate-Flipping Issue then (2) analyze one-such Bloc-of-10000 in detail, to demonstrate the likelihood that you are correct.
...Russian propaganda in support of Trump was widespread and they helped support the rhetoric
No doubt.
Now, all you(r side) have to do is to demonstrate its effectiveness in a reliable and defensible fashion, through analysis and quantification.
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Unfortunately for you(r side), the bottom line here is, if you(r side) cannot provide such data, then it (a) never happened or (b) you(r side) won't do its homework.
Either way, under such circumstances, it's not a
Tough Sell... it's an
Impossible Sell... or, put another way...
No Sale.
We, the People of the United States, do, indeed, need to learn the lessons of the 2016 campaign season and election, and guard against foreign influence.
You(r side), in turn, need to look elsewhere for the
decisive cause(s) of your shocking and humiliating defeat on November 8, 2016.
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With all respect and goodwill, I suggest that you begin by looking at those aspects of your agenda-platform that you
now understand are not palatable to your countrymen.
Then - again, with all respect and goodwill and hopes for a better future - I humbly suggest that you take a long, hard look in the mirror, rather than blaming everyone else.
You need to stop being seen as standing alongside Illegal Aliens rather than your fellow countrymen.
You need to stop being seen as defending outrageous Muslim behaviors and embedded cultural isolation rather than standing alongside your fellow Western Civilization folk.
You need to stop being seen as enabling
perversion homosexuality in public life and overseeing the legal degradation of traditional marriage.
You need to stop being seen as the Party of White Guilt and deluding yourselves that you can continue to win in the future without courting the White Vote as your Majority Base.
You need to stop being seen as Internationalists-Globalists and Open Borders advocates, and to begin putting America as the primary beneficiary of your diplomacy.
You need to stop being seen as only caring about the Coastal and Urban Liberal Strongholds and spend one helluva lot more time courting White Straight Christian America.
Rightly or wrongly... true or not... in whole or in part... you(r side) is
SEEN in this way... you(r side) is
PERCEIVED in this way, and, let's face it...
In politics,
PERCEPTION is
EVERYTHING.
If you have to explain-away those perceptions, you're already on the defensive, and well along your way to losing - again.
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Hard on the heels of multiple scandals and Bad Optics Moments during the 2016 campaign, you hired a Hispanic as DNC Chair and a Muslim as vice-chair.
Sorry, but that was a matter of "
doubling-down on 'stupid' " - not exactly brightest-crayon-in-the-box thinking - more like collective petulance and childish defiance.
You need to change-out DNC leadership sooner rather than later.
The only saving grace for you in all of this is that Drumpf is so vile and so despised that you may actually win an upcoming election or two or three as a simple knee-jerk reaction.
But the longer you postpone your ever-so-necessary Come-to-Jesus Moment, and delay taking that long, hard look in the mirror, the longer your access to power remains at-risk.
You(r side) won't do that... you won't take that long, hard look until you're absolutely forced to... you'll continue to delude yourselves... until it's too late.
Such is the fate of impractical idealogues, on both sides of the aisle.
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God Save the Republic.