Trump in 2016:
She shouldn’t be allowed to run.
If she were to win this election, it would create an unprecedented constitutional crisis.
In that situation we could very well have a sitting president under felony indictment and ultimately a criminal trial.
It would grind the government to a halt.
Source: https://www.independent.co.uk/tv/news/donald-trump-trial-guilty-hillary-clinton-b2556563.html
We have less qualifications to run for president than we do for working at McDonald’s. Per the constitution you need to be born in the USA, be 35 by the day you are sworn in, and have lived in the USA for the last 14 years.
But as others have said, the felony thing prevents weaponizing the justice system against political opponents.