First, it was the National Recovery Act, where FDR explicitly tried to creat an economic system modelled on Mussolini-style fascism. This was killed by the Supreme Court. But the will of government to create an economic system where private companies win and lose based on how well connected they are to politicians never goes away. The lastest attempt to set up such a managed system was via the Lieberman-Warner climate bill:
But perhaps even more pernicious is the way that "carbon credits" are distributed.
The credits are best described as a pulled-out-of-thin-air government-created fiat currency,
that is accepted only by the government in exchange for the
government's permission to let you emit CO2. (If ever a system was perfectly set up to be abused and politicized by politicians, this is it.)
Government bureaucrats will decide
sector by sector and industry by industry which companies get the
credits. Implicitly, that same decision by government regulators also
determines which companies will need to buy credits from the politically-connected companies who could get their carbon credits for free.