Bernie will take a page from Justin and tell the voters what they want to hear, get real.
Its far and few between that were actually honest like Harper.
Beside what is Justin going to campaign on, how he lied to get to office or all his broken campaign promises. Perhaps he can focus on massive personal debt and  out  of control housing prices that have enslaved the middle class and their children. 
What is he going to say to the leap manifesto crowed this time around, trust me???
No Kathleen, NDPee in Alberta or nice visits from Obama, No anything but Harper funded as a " union negotiation fee " yes the public unions will actually have to foot their own bill.
The establishment took Harper out after 10 years, its not going to work against Bernie especially with O'learys backing.
Perhaps Freeland or one of his other space cadets can put a nice word in for him.