But does the new DNC platform call for a large carbon tax? Does it price energy-intensive economic activity appropriately? Subsidies for alternatives don't do that.

Mainstream political thought in the US has largely self-sorted into two categories of politicians - ones that don't believe that climate change is happening, and won't do anything about it, and ones that do believe that it is happening, and won't do anything about it. Neither is of any use to us.