I'm not saying that it can't happen, but that it is hard to quantify.
What did happen is that a guy trusted to provide intelligence on the Russian campaign did the same damned thing with the same budget in a much smaller election, and that "experiment" was called harmless because it was so "small".
What did happen is that an American super PAC illegally working directly with a campaign had a propaganda budget sixty times larger than the Russian's, and we aren't discussing whether that had an impact.
What did happen is every mainstream news outfit streamed propaganda with budgets in the billions
What did happen is one of the candidates chose Donald Trump as her opponent and encouraged the DNC and the media to take him seriously, and whether they were acting on her behalf or on their own, they did, in fact, give him platforms worth billions.
What did happen is that the losing candidate's lawyers had an opportunity to manually count 75,000 ballots that were almost certainly almost all for her, in a state she lost by just 11,000 votes, and they instead, inexplicably, said they were just there to observe, and watched a manual count on someone else's dime get tossed out of court.
What did happen is that the losing candidate failed to campaign in three states that turned out to be pivotal.
What did happen is that the losing candidate's political novice opponent ran an electoral college campaign and was ridiculed by Rachel Maddow for doing so.
What did happen is that one of the candidates pre-positioned a friend to control the DNC, then gave the DNC $20M for control of "staffing, funding and message" during the primary, and the resulting sabotage, even before there was proof it had happened, so enraged some of the electorate that that candidate was a tough sell, even with Donald Fucking Trump as her opponent.
But it was the
Russians. [okay, that one may have been brilliant

]