A question of balance
Other than political ideology, there's a huge and fundamental difference between a Donald Trump and a Hillary Clinton presidency.
Consider these scenarios:
1. Donald Trump is elected president. He proves to be a disaster.
What is the likelihood he will be impeached and removed from office?
The Democrats would be happy to do so. The Republicans would not back him and will comply with impeachment or force him to resign.
2. Hillary Clinton is elected president. She proves to be a disaster.
What is the likelihood she will be impeached and removed from office?
The Democrats would not dare impeach a member of their own party, no matter how badly she performed. The Republicans would not dare to impeach another Clinton and certainly would not impeach the first woman president.
So a President Trump will have to "watch his ps and qs." His behavior and actions will be monitored carefully by the Democrats because they would be happy to impeach him. Some Republicans would join them. As a result, Trump won't be able to act as an imperial president. He won't be able to "recklessly" lead the U.S. into a nuclear war, as the Democrats claim he would. He'll have to cooperate with Congress or face great difficulty. There will be give-and-take and compromise on all sides. That's how our government is supposed to work!
But a President Hillary Clinton will be able to do anything she wants without fear of any repercussions whatsoever. In effect, she will be "Queen" Hillary, just as we now have "King" Barack. That's not how our government is supposed to work.
This should scare both Democrats and Republicans.