What are the meanings of "dead skunk" and "skinned possum" in this TV sketch?

At 0:53 and 1:53 of this video (http://zap2it.com/2015/07/key-peele-hillary-clintons-anger-translator-savannah-obama-luther/) it says “you are the dead skunk I got to step over” and “folks just as soon vote for a skinned possum as a Democrat”.

What do these two sentences mean?

Sorry for this video containing explicit words. I would like to be sure the meanings for my translation work.