Regardless of how legit the recent US drop in emissions was or wasn't, I do not currently believe in any government restrictions on CO2 emissions. I believe climate change is real but not (yet) worth intentionally slowing down present day economic activity anywhere in the world. Those negatively impacted can be compensated, seawalls can be built, migrants taken in, etc.
In a democratic country you have the right to that opinion and to vote accordingly, as other people have the right to believe otherwise and to vote accordingly. However, you should be aware of the actual facts and not the fossil fuel sector lies. The costs of climate change are already enormous and are going to get larger especially without C02 abatement.
For instance: Climate change means that, in many parts of the world, the way we farm is no longer working.
https://www.bbc.co.uk/sounds/play/w3ct38n9
The mitigation you refer to is not only extremely expensive but climate change is already slowing down economic activity in much of the world (look at Pakistan and China right now) or is already raising prodution costs.
In regards to migrants, that's a joke. The U.S couldn't even take in 40,000 migrants from Syria and Europe was little better. There is no way right wingers in the U.S or Europe will accept millions of climate change refugees.
Have you considered that intentionally slowing economic growth may increase the risk that we are still dependent on oil and gas in 100 years and the really bad non-linear climate change impacts start hitting us? In the present day, restricting oil production in free countries doesn't mean it goes away, because the technology isn't there yet to replace it. It just shifts to authoritarian countries that can then extort us and our allies. This is why you need as much of an economic surplus as possible in the free countries to speed the experimentation and technological development along. BTW I do strongly support clean energy R&D subsidies for this reason.
I mean federal governments should definitely set targets for CO2 emissions reductions. But actual “restrictions” sound very difficult if not impossible for any political or corporate entity to enforce. Real-life isn’t NationStates.
Probably zero but still infinitely more than any of Pakistan’s neighbors, that’s for sure.