The key word here is "sufficient consensus." Your judgement of sufficiency is a personal opinion.
I could, for example, define "sufficient consensus" as requiring that all laws require a 90% supermajority in the Senate. Or I could reduce this to 50% of the Senate. Alternatively I could reform Congress so that lawmaking requires voting totals representing 50% of the population.
Each of these is one possible version of "sufficient consensus", and still none of them actually matches the version we actually have. What is clear is that the sclerotic nature of today's Congress is problematic, and it's doing a great deal to undermine faith in our democratic system.
It might be obvious, but I feel like it's lost due to partisan motivated reasoning. eg. when your preferred party doesn't control the senate, then the filibusterer is an important part part of democracy that forces widespread consensus, but when your party does control the senate the filibusterer is a undemocratic tactic used by the minority to obstruct the majority.
Consider, for example, how the FDA operates. They have a broad mandate to keep food clean and drugs safe. They don't have an explicit mandate of "you must only regulate tylenol and aspirin, we need to pass a law for new drugs each time they come up."
This ruling finds the EPA, who has the mandate to keep pollutants out of the air, can't determine that CO2 is a pollutant. Why is that? The 2016 clean air act specifically gave them the power to regulate air pollutants.
The only answer is political activism. There is no difference between the FDA's broad mandate and the EPA's broad mandate.
I recommend reading the dissent on this case. It makes it absolutely clear that this is an EPA power. The conservatives couldn't get new laws passed repealing the EPA, so instead they packed the court with political activists so they could make law from the bench.
I could, for example, define "sufficient consensus" as requiring that all laws require a 90% supermajority in the Senate. Or I could reduce this to 50% of the Senate. Alternatively I could reform Congress so that lawmaking requires voting totals representing 50% of the population.
Each of these is one possible version of "sufficient consensus", and still none of them actually matches the version we actually have. What is clear is that the sclerotic nature of today's Congress is problematic, and it's doing a great deal to undermine faith in our democratic system.