But now that you bring it up, the Constitution clearly does not authorize the federal government to regulate natural gas prices.
Oh yes it does, by authorizing Congress to protect the general welfare.
And you were just arguing in the video game thread that states have a constitutional right to violate the First Amendment.
1. The general welfare clause isn't a blank check to do anything that isn't forbidden - the means by which the federal government may protect the general welfare is enumerated within the constitution, and is limited to those powers.
2. See the bolded word in Emsworth's quote above.