I heard him say that he thinks one can overdue preparing for such things. It can cause you to overthink and your answers might be stilted and without feeling or passion.
Hitlery has been rehearsing for this debate for a LONG time - intermingled with much sleep. I hope she’s concentrated on this for so long that she goes blank. Or passes out.
Consider this...take a look at the Trump web site....
See those magnificent properties, golf clubs and residencies world wide....
I am sure Trump didn't have a "practice negotiation" when acquiring those properties.
HILLARY
Outside of saying something bizarre, the main goal of the debates are to come across as likable, and someone you would feel comfortable seeing and hearing for the next four years. There's not enough time left in the future of humanity for Hillary to achieve that goal.