The meaning of Lindsey Graham’s carbon announcement

GOP Sen. Lindsey Graham and Democratic Sen. Sheldon Whitehouse are teaming up to "put a price on carbon." Photo: John Minchillo / AP

GOP Sen. Lindsey Graham announced at a climate change event at Yale Tuesday that he's working with Democratic Sen. Sheldon Whitehouse on legislation to "put a price on carbon." He didn't get into details, but Whitehouse has for years been pushing a carbon tax.

The big question: Whether Graham's announcement can lead to other sitting GOP senators coming out in support of pricing carbon in some fashion beyond the tiny circle that already has in years past.