It’s insulting.
If you don’t do the work and earn an F, that’s insulting?
From http://www.businessinsider.com/donald-trump-iowa-ted-cruz-ethanol-2016-1?op=1
“You haven’t been good. In fact, some people say, ‘Oh, it doesn’t matter if you win Iowa.’ Now don’t let them talk to you that way. Don’t let them talk to you that way,” Trump said.
He added: “You have not picked a lot of winners. And that will make me feel good only if I don’t make it with Iowa.”
Now that’s insulting.