You should not underestimate the threat this man poses to the republic. He has no respect for the system of governance, whether it be the judiciary (Mexican judges need to recuse themselves!), legislature (if Paul Ryan didn't endorse him, he was going to "pay a big price"), opposition parties (lock her up!) or press (the first amendment does not allow them to print whatever they want).
Example of potential issue: Just last night he denied that stop and frisk had been found unconstitutional. It is not hard at all to imagine a Trump administration utterly ignoring rulings he does not like. And it is all about him, make no mistake.
This is how fascism comes to countries.
And don't respond with the Obama-did-this-stuff bullshit unless you want to display ignorance. He didn't - not even close - and no president has.