Fossil fuels are already protected and subsidized beyond economic sensibility for the profitably of oil barons and corrupt polliticians. Until the oil barons cannot afford bribery and still turn a profit the USA will be hooked is what I'm getting at. They'd rather keep the exploitation going until collapse happens than find a way to transition to cleaner energy sources.

Edit: I'd also like to add, it isn't just fossil fuels setting the USA back, it's also the development pattern. Even if everything went electric today with green energy, the USA would be wasting tons of that energy due to cultural and devlopmental patterns. This isn't just an oil issue, it is also a land use, zoning, gabage/waste and 100s of other things that are just so damm profitable we can't stop.