Patrick Brown credits his mother with helping him overcome his stuttering. When he was a kid, she cut back her work schedule to take him to speech therapy at the Clarke Institute (Now the Speech and Stuttering Institute), driving from Barrie to Toronto for the visits. The therapy gave him the tools and the confidence he needed to improve his speech.
Later in life public speaking also helped him, and he entered the worlds of law and politics. Brown started out his political career with municipal leadership, serving on the Barrie City Council for two years. Fifteen years later he was elected Leader of the PC Party in May of 2015. Speaking is much easier for him now and he is accustomed to addressing huge groups of people. But he still finds hesitancies creeping in sometimes. You can read more in the Toronto Star and the National Post.