"Had to call in the US" -> "the US wanted its cut as top dog, and invited itself"

Sarkozy and Cameron publicly pushing Clinton and Obama to join in on enforcement for weeks would indicate something else, given the marked policy difference between how that was handled and Syria. Libya is not really something America has a strategic interest in.

America wasn't going to let Libya establish the African Dinar.

Exactly! If you watch Obama's past interviews he says explictely that US was disappointed by France's weakness on Libya. Not to mention that France made a big deal of its "decisive" action after the US took down the anti-air defense.