Just to be fair- since Republicans are constantly made fun of for their flubs, gaffes and other sillies- here's some of Barack Obama's best.
Remember how George W. Bush was mercilessly skewered for mispronouncing "nuclear"?
Well, Obama has a bunch of his own, including his tendency to sputter when he's off teleprompter. There are some classics here. Watch him call 'Austrian' a language. Can you imagine if that had been Bush?