Any candidate running for POTUS calls Krauthammer such things doesn't have the temperament to be POTUS...
As for being a clown...it takes one to know one and as for being a dummy, I'm waiting to hear the words Dr. Donald Trump..
Here is a speech from Trump, from a month ago.
It is quite good.
Watch until the 3:00 mark, then if it’s not interesting you or firing you up, exit. Three minutes is not much, to just check something out for yourself.
Watch the first three minutes anyway.
It is from a big GOP event, Trump spoke there and got some big applause. The total video is 28:28.
Make up your own mind.