"yes we can" came from the Farmworkers who endorsed Hillary. There is no copyright in any case. The Man from Hope used hope in 92, but other used it before him. Change is used by a lot of candidates. Even Bush was going to change the tone in Washington.  

I think Obama is an Empty suit and phony. I keep thinking of Chancy Gardner when I see him. But I think he is more of a con man/demagogue/charlatan. And I find his supporters just crazed suckers.