The reason Obama has a failed presidency is that he let die our best chance to preserve a livable climate and restore US leadership in clean energy – without a serious fight.
We can’t run history over again, just like we can’t run our suicidal climate experiment over again. So all suppositions that things could have been different are just that, counterfactual suppositions.
BUT we can see in the likely ratification of the New Start treaty that a completely different strategy than the one the White House had for climate change can get significant bipartisan support for a controversial piece of legislation in the face of concerted obstructionism by the Senate minority leader.
What did Obama do right on New Start that he didn’t bother to do on climate?