President Joe Biden is keeping quiet on one of his biggest potential bragging rights, the rise in domestic energy production.

It might seem like a head-scratching approach to reelection, with the bulk of polls showing Biden losing in swing states to his November rival, former President Donald Trump. But the paradox reflects deep sensitivities within Biden’s Democratic coalition, for whom climate change is a top problem, and the use of renewable energy, not old-fashioned fossil fuels, is the coin of the realm.