Finding Rhetorical Devices

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Kane: with one purpose only: to point out and make public the dishonesty, the downright villainy, of Boss Jim W. Gettys' political machine -- now in complete control of the government of this State! I made no campaign promises, because until a few weeks ago I had no hope of being elected.
Now, however, I have something more than a hope. And Jim Gettys -- Jim Gettys has something less than a chance. Every straw vote, every independent poll shows that I'll be elected. Now I can afford to make some promises!
The working man -- The working man and the slum child know they can expect my best efforts in their interests. The decent, ordinary citizens know that I'll do everything in my power to protect the underprivileged, the underpaid, and the the underfed!
Well, I'd make my promises now if I weren't too busy arranging to keep them.
Here's one promise I'll make, and boss Jim Gettys knows I'll keep it: My first official act as Governor of this State will be to appoint a Special District Attorney to arrange for the indictment, prosecution, and conviction of Boss Jim W. Gettys!

Bias
"Downright villainy" is definitely an example of bias that you could use and ...