Bully?
He doesn't have a speech impediment. 
If anything he's simply a moron with low cognitive abilities who's unable to speak without rehearsed scripted lines and who shouldn't be tasked with the important role of running a country.

He wanted this position so he damned well better live up to our expections after dumping an incredibly gifted PM who was running our economy so much better recovering from the world-wide recession and getting us back to a balanced budget. 

Quit trying to make excuses for the bad choice you made last election.