We need a president to declare transitioning of fossil fuels to be a national emergency and also a matter of national defense, and set the military industrial complex to work actually building a sustainable supply chain for energy and materials.
Of course it's important and it's inevitable but calling it an "emergency" would by hyperbole and cause it to be taken less seriously.
The US is a little under 15% of the world economy, and a little over 15% of the worlds energy use. It’s going to take a lot more than just the actions of one President to solve climate change.
So instead of hyping up things you're going to do, you need to hype them down. Ideally, you'd just go around saying you're doing absolutely nothing. (Also, don't raise gas prices.)
(This is not how most people sell it, but it's true.)