It has nothing to do with facts. It is which facts you are interested in.
If you talk about Tesla having created some jobs, fine, then it is a success. If you are talking about Tesla not even selling 10000 cars per year, and are used to "regular" car industry sales numbers, it is a joke.
The idea of absolute truth in politics is questionable. You will in almost all cases find a way to show that the guy you don't like is wrong and the guy you like is right.
Fact, strangely, is loaded. Romney brought up Tesla as a negative investment in green energy. Obama holds them, or what they're doing, as an archetype of the new "American way" forward (even though they aren't breaking auto sales records). If that were explained, tweet sized, the viewer could have a better understanding of the rhetoric.
Romney's dad was chair of American Motors during what passed for its glory years (he took the stock from $7/share to $90), so this is a topic where he may have some familiarity.
