I admit I'm biased, but I don't remember this. I do remember concerns that Russia had interfered with the election, which is was found to be true (see Mueller report, Cambridge Analytica, etc.) There were also less well founded concerns that Trump himself was not only helped by but actually colluding with the Russians, which all evidence points to being false.
Most importantly, Hillary Clinton conceded the election the next day, as did Al Gore in 2000 once it was clear he didn't have a path to victory. Both pledged to support the victor. Trump hasn't done that, two years on.
Most importantly, Hillary Clinton conceded the election the next day, as did Al Gore in 2000 once it was clear he didn't have a path to victory. Both pledged to support the victor. Trump hasn't done that, two years on.