I'm not sure if that's really a middle stance. The argument is over who should pay the economic cost of controlling greenhouse gas. The liberals say the US should pick up the tab. The conservatives say that there are other nations that produce greenhouse gas, and they're getting a free pass.
Bingo.
I'm pretty sure that because of reforestation, some claim the U.S. is a carbon sink.
I'd be for some research to determine a (preferably reversible) way of taking CO2 out of the atmosphere in a cost-effective manner, as a hedge, in case we really do need to do it. But nothing we've seen yet, really shows it's a necessity at this point.