Political parties and candidates dig up dirt on each other all the time and that is the nature of politics . I have been involved in campaigns and there is a lot of research that parties conduct on each other. 
The difference here is we have a foreign power who has committed illegal acts to get the information i.e. hacking web sites of a political party i.e. Democrats and then disseminating  the information to the opposition and eventually to the American public.  
How would you feel if the Russian government did something similar in Canada , would that be alright with you?