Is the cartoon at this link the one you were thinking of?
http://newsblogs.chicagotribune.com/taking-a-stantis/2011/12/mitts-mouths.html
let me get to the broadstrokes
on the left is that fixed mouth pic of Myth....split screen and to the right is a pic lookin at ears read the teleprompter
now insert Jeff Dunham,,,,,,and add this dilema
Mitt or a mouth of Mitts can change his mind when ax’d a question by Dunham however Obama cannot change his answer as he is only readin so they argue where to back up the teleprompter and which mouth has the time etc
the script w/ time could win awards