If a malicious external actor attempted to hack our voting counts, our intelligence agencies would at the very least notify the commander-in-chief and likely the press, if they didn't thwart the intrusion outright. There's no way any American president, right or left, would downplay such an incident or deflect blame from the guilty party. Retribution would be swift, and it wouldn't just be the US -- the whole Western World would retaliate. Like I said, this rationale was my best attempt to explain why no one has so far directly altered our election counts.
Ultimately, abusing social media proved pretty damned effective without putting the Russians in any real risk. The worst possible outcome for them was being told to stop -- after all, the election *still* faithfully represented the will of the people. Where Trump is taking us, though, is a political climate where there's no consequences for severe and direct attacks on our elections.
I'm intending to argue two things: first, without a political climate that would impose consequences on actual election hacking, the odds of our elections being targeted go up dramatically. Second, Trump is steering us toward precisely such a political climate.